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aluminum prep
Thread Starter
Pro
Joined: Jun 2008
Posts: 680
Likes: 3
From: charlotte N.C
aluminum prep
I have read that there is special prep to use like a phosphoric acid before painting aluminum like the bell housing. If you don't prep the aluminum first it risk the paint not sticking as long. How did you guys paint your aluminum parts? Anything produces you used?
Thanks
Thanks
Drifting
Joined: Apr 2008
Posts: 1,565
Likes: 2
From: Sparta Mo.
Clean and dry the part in solvent. (the "dry" part is super important.) Even cast parts I'll sand down. Usually so they're smooth. (lotsa work) then a good epoxy primer or etching primer as a base. Sealer and a top coat and you're all set.
Thread Starter
Pro
Joined: Jun 2008
Posts: 680
Likes: 3
From: charlotte N.C
I have looked around for a while now and yet to have found someone who has use phosphoric acid before painting to acid etch the aluminum. I am getting my information from a aircraft painting book. Is there any factor why aircraft aluminum would be diffent for something like the aluminum on the bell housing or fan?
Burning Brakes
Joined: Jan 2009
Posts: 1,224
Likes: 1
From: Clarksville Indiana
A brand of wheel cleaner called Gold Eagle might do what ya want. Its for non-clear coated wheels and says etching formula on it. Works great on intakes to clean them. It leaves a etched surface on smooth/polished alum parts
Race Director
Joined: Mar 2006
Posts: 14,112
Likes: 28
From: Florida
I have looked around for a while now and yet to have found someone who has use phosphoric acid before painting to acid etch the aluminum. I am getting my information from a aircraft painting book. Is there any factor why aircraft aluminum would be diffent for something like the aluminum on the bell housing or fan?
Then use zinc chromate primer for alum, hard to find, but the right stuff, same as aircraft.
Pro
Joined: Nov 2000
Posts: 582
Likes: 1
From: Madison Wisconsin
That's what self etching primer is for earthequake68 gave you the right answer the first time. Don't use zinc chromate, take it from an old aircraft mechanic it's dangerous stuff that's why it's banned in half of the United States that's why its so hard to find.
Last edited by Mad Vette; Oct 20, 2009 at 02:18 AM.
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