Thứ Sáu, 25 tháng 11, 2016

buffed aluminum hood w/clearcoat? part 1

ride5000 04-06-2005 09:17 AM

buffed aluminum hood w/clearcoat?
any ever try this? seen one?

i have a black car and i have many scratches/dings on my hood. i was thinking why not just strip it down, give it a nice brushed surface, and spray some clear coat on it? then i won't cry when i get a dent/ding/scratch/whatever.

it looked good on cobras. ;)

i'm thinking the dull brushed Al silver would look very nice with the black car and hoodscoop. i'm not thining 2000 grit wet/dry shine here either.

thoughts?

ken
CalcVictim 04-06-2005 09:40 AM

I am not sure how you go about doing it but I bet it would look hot, maybe do the trunk also.
mbiker97 04-06-2005 09:44 AM

Do it. Raw metal looks sweet.
Bonefizz 04-06-2005 12:32 PM

Beware of the wicked glare you would get while driving into the sunset! Invest in a nice pair of sunglasses!
subieworx 04-06-2005 01:15 PM

My friend and I were talking about this a few weeks ago.
Monku Monku 04-06-2005 01:17 PM

If you were to take the paint off for either the naked metal look, or for paint prep, is there anything to worry about if one uses an electric sander/grinder? Besides over sanding spots, is there anything specific to worry about for our hoods?
Jon-RIWRX 04-06-2005 01:26 PM

Ricer! :)
ride5000 04-06-2005 02:36 PM

no ricer, just tired of a crappy looking hood! :lol: i got another nice ding in it this past weekend... enough to chip the paint! :mad:

the more i think about it the more i like the idea... :banana:
kennyvb 04-06-2005 02:43 PM

Go for it; if you don't like it...Just repaint. :)
0db 04-06-2005 03:06 PM

I want to paint my whole car with Rhino Liner.
alexcd 04-06-2005 03:12 PM

That's the most un-bling thing I've ever heard... sounds practical except for the added weight.
ride5000 04-06-2005 03:29 PM

clear coating may not be practical, since it too will yellow, chip, flake, crack, etc.

i'm starting to narrow it down to two options:

a) have it anodized. could get pretty expensive, but it's a nice, hard, lifetime coating.
b) let it oxidize naturally. finish gets duller and duller but can be revived with a wetsand or rubbing/buffing compound periodically.

i want to avoid the mirror finish for practicality reasons.
0db 04-06-2005 04:23 PM

[QUOTE=alexcd]That's the most un-bling thing I've ever heard... sounds practical except for the added weight.[/QUOTE]


I could fearlessly park in spaces with 6" on each side between beat up old suburbans!
jac04 04-06-2005 06:07 PM

[QUOTE=Monku Monku]... is there anything to worry about if one uses an electric sander/grinder? [/QUOTE]
Yes - heat/warpage and sanding scratches. The best method for removing the paint would be to use aircraft paint stripper. I used it to strip my Land Rover aluminum body before a re-paint and it worked great.

Now, here's an idea. After stripping/ prepping the hood, just cover it completely with Rockblocker or 3M clear film.
randolph-rs 04-06-2005 06:17 PM

paint stripper would be the best option. Then you could wet sand it with 2000 grit sand paper for the ultimate smoothness and shine. Then go have it powdercoated with a nice clear stardust topcoat to give it that metal flake sparkle. In my opinion that would be pretty nice. Just my thoughts.
teknisa 04-06-2005 06:42 PM

[QUOTE=randolph-rs]paint stripper would be the best option. Then you could wet sand it with 2000 grit sand paper for the ultimate smoothness and shine. Then go have it powdercoated with a nice clear stardust topcoat to give it that metal flake sparkle. In my opinion that would be pretty nice. Just my thoughts.[/QUOTE]

Or he could just pearl it...
Monku Monku 04-06-2005 06:54 PM

Thanks for the info regarding the paint stripper. Sounds much easier than trying to sand off the paint. I ran head on to a flying 2x4 on the freeway one night- kicked up by the car in front of me- and it put two dents in my hood. I want to try fixing the hood myself before paying someone, or before replacing it with a new one. Thanks again for the info.
gtwagon941 04-06-2005 07:19 PM

[QUOTE=0db]I want to paint my whole car with Rhino Liner.[/QUOTE]


I saw a toyota tacoma extended cab that had been fully rhino-lined. It just looked like a dirty black truck when you are a bit away from it.

It was kinda cool though.

Back on topic, I think something like the bare metal would be cool. Just be sure to take some pics.

Jared
wrxpeed 04-06-2005 07:22 PM

yeah i'm interested in this scheme, take pics when done if you do it.
Handsdown 04-06-2005 07:41 PM

that could be cool. you'd have to work pretty hard to get it sanded down evenly though.
ranger5oh 04-06-2005 07:47 PM

I think it is going to look lame... sorry, just my opinion.
WickedSTI 04-06-2005 09:03 PM

If you di this WD-40 and steel wool are your freinds.Sand the hood till it looks uniform and then get out the wd-40 and steel wool if you want it to look all them same and be ez to do over and over.People do it to bikes all the time.Brad
R_W 04-06-2005 10:10 PM

[QUOTE=ride5000]clear coating may not be practical, since it too will yellow, chip, flake, crack, etc.

i'm starting to narrow it down to two options:

a) have it anodized. could get pretty expensive, but it's a nice, hard, lifetime coating.
b) let it oxidize naturally. finish gets duller and duller but can be revived with a wetsand or rubbing/buffing compound periodically.

i want to avoid the mirror finish for practicality reasons.[/QUOTE]

Don't do b. It will oxidize fast and look like crap. I have an aluminum bicycle that lost it's anodization in a few spots, and I can't keep it polished fast enough.

R
WRXRgr 04-06-2005 10:38 PM

[QUOTE=ride5000]
b) let it oxidize naturally. finish gets duller and duller but can be revived with a wetsand or rubbing/buffing compound periodically.
.[/QUOTE]

The only downside is aluminum can get kinda nasty looking when it oxidizes...and can tend toward pitting, too. I'd be leery, with you near the coast...check out how raw aluminum looks on boats after awhile!

Edit: and as far as sanding/buffing, remember what's used in grit for some sandpaper---aluminum oxide!!
Uncle Scotty 04-06-2005 11:19 PM

paint stripper.....;)

...and just say NO to using steel wool on aluminum.....bad idea....galvanic action = bad juju.
randolph-rs 04-06-2005 11:36 PM

as a machinist I can tell you that 2000 grit sandpaper, dishwashing liquid, and a slow flow of h2o will leave aluminum looking amazing. I have made many different items out of aluminum and wet sanding with 2000 grit and dawn has really been a great combo for me. I also use WD40 and a very fine 3m pad to achieve an almost chrome like finish. I do have to follow up with aluminum polish to finish the deal. However, once you use polish or anything with petroleum in it your luck for paint adhering to the surface is greatly diminished.
It would be a wise idea to either clearcoat, anodize, or powdercoat bare aluminum. If you live in very salty conditions such as the coast or places where road salt is used often then bare aluminum will corrode much faster and begin to deteriorate. So definately make sure it is protected.
ride5000 04-07-2005 09:03 AM

thanks for all the input folks.

what i've learned:

strip the paint instead of abrading it off
stay away from steel wool, use 3m pad instead
coat it with SOMETHING after it's bare

i will likely try a patch on the inside/underside of the hood as a trial... see how difficult it is to achieve a desired surface, then maybe try a clear coat longevity test.

i think it would look pretty cool, imho.
Timdog1650 04-07-2005 09:10 AM

I bet you could buy a stock hood from someone with an aftermarket/cf piece and go to town playing around with it. That's what I would do, maybe break it up into 4 different sections and try 4 different techniques/finishes to see what you like best before you do the whole thing on your hood.

+1 for strip/powdercoat.
srad711 04-07-2005 10:09 AM

I have many many years polishing and working with aluminum. Here's my advice.
1. paint stripper to get off the paint take your time and let the stripper do its work.
2. use pressure washer to get stripper and paint off do not sand paint off.
3. let hood comletly dry before next application of stripper.
4. finish should be nice and satin.
your choice
a. get anodized and never worry about again, satin finish easy to maintain.
b. leave bare clean with wd 40 or silicon spray leave light light residue on ....you will need to keep up with cleaning and possibility of pitting can occur but fixing is very easy sand out marks scotch brite pad to get nice finish back.
I recommend getting anodized ....not expensive either
MikalsWRX 04-07-2005 12:22 PM

I was thimking of doing my gas door lid like that
dayjayvw 04-07-2005 12:42 PM

wouldn't there be a ton of glare? :(
drivin blind 04-07-2005 12:50 PM

I'm still fantasizing about the Rino Liner. Rock Blocker for front and hood, Rino liner from the door handles down and a 2X6 on the front bumper to "help the slow drivers out of the left lane". Could sell it as a package.
ride5000 04-07-2005 01:44 PM

[QUOTE=dayjayvw]wouldn't there be a ton of glare? :([/QUOTE]

how much glare do you get off your hood now?

you really don't see much of the hood at all from the driver's seat. at least imho.
MYfirst00 04-07-2005 03:20 PM

I like the idea. I did a quick photochop example of what it might look like (I think this represents an aluminum polished hood). Not sure who's car this is, just borrowed the pic from the black thread.

[img]http://home.comcast.net/~rm_taylor/wrx_alum.jpg[/img]
TRH_legacy2k 04-07-2005 04:19 PM

This is probably completely out of left field, but are there any nasty weld spots from the underside that might show through?

I assume the hood is one stamped piece, but what do they do to hook up the hood-stiffness webbing deal on the inside?
jac04 04-07-2005 04:37 PM

I believe that the hood skin is bonded to the stiffener and not spot welded, but it is something to look out for.
WRXRgr 04-07-2005 07:06 PM

I bet a nicely done CF scoop would look pretty sharp on the polished aluminum, Ken!
ride5000 04-08-2005 10:37 AM

[img]http://www.kirkhammotorsports.com/images/semalogo.jpg[/img]
fragment 04-08-2005 11:23 AM

I stripped my hood when I painted the car. Used chemical stripper and let it sit for a while, then scraped and rinsed. Too many stone chips to sand out. There are no welds or anything else that shows through, just aluminum. I played with the idea of polishing and actually tested a small spot with steel wool. Didn't take long for a shine to develop. I ended up re-painting though.
migs76 04-08-2005 11:31 AM

[QUOTE=ride5000][img]http://www.kirkhammotorsports.com/images/semalogo.jpg[/img][/QUOTE]

i just messed myself.
ride5000 04-08-2005 01:10 PM

[QUOTE=fragment]I stripped my hood when I painted the car. Used chemical stripper and let it sit for a while, then scraped and rinsed. Too many stone chips to sand out. There are no welds or anything else that shows through, just aluminum. I played with the idea of polishing and actually tested a small spot with steel wool. Didn't take long for a shine to develop. I ended up re-painting though.[/QUOTE]


^^^^^^^^

EXCELLENT information... thanks a lot! :banana:
JMP781 04-08-2005 07:21 PM

[QUOTE=gtwagon941]I saw a toyota tacoma extended cab that had been fully rhino-lined. It just looked like a dirty black truck when you are a bit away from it.

It was kinda cool though.

Back on topic, I think something like the bare metal would be cool. Just be sure to take some pics.

Jared[/QUOTE]


I've also seen a Tacoma here where the entire truck was Rhino Lined. Good Idea for cleaning, but there goes the resale.
dropmech 04-08-2005 11:36 PM

[IMG]http://img.photobucket.com/albums/v237/IDP/MCmustang_s1.jpg[/IMG]
Jon-RIWRX 04-09-2005 02:16 AM

ken, buy some of the ultra fine glass beads and we can use the sand blaster to remove the paint and smooth it. I mean we could try sand too at a lower psi then just polish the hood after.

- Jon
fragment 04-09-2005 03:46 AM

I'd be very careful about using a blaster or power sander. Too much localized heat could warp the hood pronto.
ride5000 08-08-2006 12:05 PM

i'm still mentally debating going through with this.

one big thing that holds me back is the loss of "sleeper" factor.

on a positive side note, the dime-sized dent w/paint chip that has been missing for over a year has shown no evidence of oxidation or pitting... and i've only washed the car twice! :lol:

for reference, here's a buffed al '04 xj jag show car:

[img]http://www.theautochannel.com/news/2003/01/04/152241.1-lg.jpg[/img]

i don't think i'll go so buffed though...
jac04 08-08-2006 12:32 PM

Just do it!
elsanto 08-08-2006 01:08 PM

if you have dents you won't be able to get them perfect without body filler.

we have a delorean in my household and when you get a scratch on it you use steel wool and some buffing liquid, it works really well.. that is stainless, i dont see why Alum would be any different.

go for it :) on a black car it'd be hot.. .WRB not so much.
foxboroxt 08-08-2006 03:27 PM

How dented is your hood? Can the dents be fixed? It might not look too nice with dents all over the place, that's one reason I went to fiberglass.
steve 08-08-2006 06:10 PM

finally, a project in I&EM&C that I can get excited about.

Ride5000, if you do go through with this, check out a product called "zoop seal" [url]http://www.zoops.com/zoopseal.asp[/url]

It's not cheap, but it offers great protection for raw metal.
Judge 08-08-2006 09:35 PM

[QUOTE=ride5000]for reference, here's a buffed al '04 xj jag show car:

[img]http://www.theautochannel.com/news/2003/01/04/152241.1-lg.jpg[/img]

i don't think i'll go so buffed though...[/QUOTE]

I am pretty sure that car is painted with a special paint that duplicates aluminum....


You will not be able to get the hood anodised unless you find someone to acid dip it and get all of the bonding agent out of it. The anodiser will not take the chance of ruining his vat with that crap. It would look cool..but way too much work to keep up and over time it will get thin....good for weight...bad for looks (the suns heat could warp it at that point)....just get it fixed....
ride5000 08-09-2006 08:35 AM

[QUOTE=Judge]I am pretty sure that car is painted with a special paint that duplicates aluminum....[/quote]

only the bumpers were coated. the rest is pure sexy aluminum. ;)

edit: here's the link:
[url]http://www.theautochannel.com/news/2003/01/04/152241.html[/url]
ride5000 08-09-2006 08:51 AM

[QUOTE=foxboroxt]How dented is your hood? Can the dents be fixed? It might not look too nice with dents all over the place, that's one reason I went to fiberglass.[/QUOTE]


ok, dent-wise, the only bad one is where the paint chipped.

it's a bit embarassing :lol: , but i'll tell you how it happened:

working under the hood, trying to get clearance to get through the firewall grommit. hood's in the way, so i get a stick and prop it up higher. i get through the grommit, go back to the cabin so i can pull the wire through. get on my back in the footwell, moving around a bit. the movement is enough to shake the hood and dislodge the stick. the hood drops onto a socket wrench in the engine compartment, making a dime sized dimple UP, which pops a bit of paint off.

now, i took a small ball pein hammer, grabbed something like a frog to back it, and managed to reduce the height, but since i was already nauseous from the dumb-ass newbie mistake effing up my hood i was very reluctant to further damage the paint on the periphery of the dent. i am CERTAIN that with some more time spent i can get the dent almost perfectly flat with the hood again. hell, it's aluminum and it's very ductile (as we're all only too aware).

other than that the only damage to the hood is the thousand or so tiny paint chips from driving through 4 new england winters, and a scratch picked up from god knows where along the front curved leading edge.

i'm also 99% certain i will NOT be buffing to a mirror finish like the jag. too blingy for my tastes, and any surface irregularities would immediately show up... i'm going more for a brushed look, like that cobra. :D

i've done work with plate al before and it's pretty easy to dress up/keep up with sandpaper. i should just stop talking about it already, get some aircraft paint stripper, and go for it.
dodiox 08-09-2006 09:29 AM

I swear I'll never buy a used subaru, u guys use them as experimental toys.
i saw guy around here with a hole in the headlight as an intake.
how stupid is that?!
ride5000 08-09-2006 09:35 AM

[QUOTE=dodiox]I swear I'll never buy a used subaru, u guys use them as experimental toys.
i saw guy around here with a hole in the headlight as an intake.
how stupid is that?![/QUOTE]

don't worry, buddy... it's not for sale. :lol:
Local_Skater 08-09-2006 09:37 AM

[QUOTE=dodiox]I swear I'll never buy a used subaru, u guys use them as experimental toys.
i saw guy around here with a hole in the headlight as an intake.
how stupid is that?![/QUOTE]

Genious
Tim-H 08-09-2006 09:41 AM

[QUOTE=dodiox]I swear I'll never buy a used subaru, u guys use them as experimental toys.
i saw guy around here with a hole in the headlight as an intake.
how stupid is that?![/QUOTE]

yeah subarus are the only car people do experiments with, it's kinda an unwritten law. :rolleyes:

I can also totally see where stripping a hood of paint or drilling a headlight would reduce the reliability of your car. :confused:
WRX-ERROR 08-09-2006 10:58 AM

[QUOTE=dodiox]I swear I'll never buy a used subaru, u guys use them as experimental toys.
i saw guy around here with a hole in the headlight as an intake.
how stupid is that?![/QUOTE]
Hehe it's pretty common to see turboed cars running an intake where the headlight was. If you think it's only Subaru's you are in for a rude awakening. :disco:
doylfish 08-09-2006 11:00 AM

if you're set on it, go for it, and the hurry up and show us the pics ;)
SparkysJDMSpeedWagon 08-09-2006 11:11 AM

Go for anodized!

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