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Tx Firefighter · 10-16-2013, 10:32 PM

If its a known low quality cast aluminum I use outgas primer then the desired topcoat.

A lot of materials simply can't be outgassed enough to remove all problems and have to be covered with the RO primer. I do a bunch of motorcycle brake plates on old Hondas. I've even outgassed them for a full 24 hours before but they still outgassed when I top coated them. The RO primer is the only safe bet to assure you're not getting into an endless cycle of stripping and redoing.

As far as prep otherwise, I don't use any potions or secret cleaners. The B17 will get it clean and grease free. Then media blast and coat.

I've been doing it this way for several years and haven't had any hassles once I figure out the technique.

10-16-2013, 10:32 PM	#3
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Prep aluminum for powder coat? If its a known low quality cast aluminum I use outgas primer then the desired topcoat. A lot of materials simply can't be outgassed enough to remove all problems and have to be covered with the RO primer. I do a bunch of motorcycle brake plates on old Hondas. I've even outgassed them for a full 24 hours before but they still outgassed when I top coated them. The RO primer is the only safe bet to assure you're not getting into an endless cycle of stripping and redoing. As far as prep otherwise, I don't use any potions or secret cleaners. The B17 will get it clean and grease free. Then media blast and coat. I've been doing it this way for several years and haven't had any hassles once I figure out the technique.