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Body aluminum - sandblast and painting

Posted: Wed Aug 18, 2021 10:48 pm
by jonnykilo
Hi all;

I have a pre-loved tailgate and winch space cover plate I intend to mount up on my S3. Rightly or wrongly, I sandblasted them this week at Blast-it here in Vic while working on a few other projects. Not having much experience on body work in general, or aluminium painting specifically, am looking for tips on the prep and paint process. I have heard alu is tough to get paint to bond to, and a tailgate is a spot where I am keen to have some resiliency to scratches and regular use. I have a rattle-can done up with matching paint by a local shop, and am ready to tackle the prep and paint. Do I need to pre-sand at a high grit to get a smother finish? Recommendations on primer, steps between paint coats?

Thanks in advance

JAK

Re: Body aluminum - sandblast and painting

Posted: Thu Aug 19, 2021 6:40 am
by mepham55
You’ll need to etch prime the aluminum first. You can find etch primer in spray cans at most stores now. If your having trouble finding some try a marine supply shop like Trotac they usually have etch primer as well.

Matt

Re: Body aluminum - sandblast and painting

Posted: Thu Aug 19, 2021 7:48 am
by jonnykilo
Thanks Matt. Always the man with the plan!