I used the PPG ALK-200 on my truck. It sprays nicely and can be used with or without the ALK-201 hardener (but that's kind of hard to find in the small quantities you'd need.) A 1/2 pint can of hardener treats a whole gallon of ALK-200. I used hardener on some of my parts, and not others. Can't really tell the difference. I used epoxy primer I got thru NAPA/Martin Senour paints (PIP-302 see attached tech sheet.) I think it would work over the rustoleum, although when I tried to used a solvent based oil and grease remover on the Rustoleum Rusty Metal Primer, it took it off. There is also a water based oil and grease remover that I'd recommend after sanding your primer with 200 grit sandpaper. The nice thing about the PIP-302 epoxy primer is that you can topcoat it up to 5 days without sanding it. So basically it could be thinned and used as a sealer coat, then topcoated almost immediately. Whatever you use, read and follow the tech sheet for that product religiously.
I also have the primer compatibility sheet for PPG products. Attaching that as well.
Last edited by klhansen; 07/18/202612:42 AM. Reason: added primer compatibility sheet
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
