Quote:
Originally Posted by K5_Knox
Hemi43, what did you use to finish the undercoat? I am debating between an epoxy primer, POR15, or open to suggestions. I have little to no surface rust.
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Don't use POR15 !! Great product over rusted steel, but that's about it. Some say they've had luck over sandblasted new steel, but I still wont use it. I used it once years ago on a Camaro trunk floor pan I installed, and I had major adhesion problems. The other issue is where it did stick, we couldn't get it off.
Over bare metal I only use epoxy. The underside of my truck was sanblasted, sprayed with epoxy, then top coated with a satin urethane black from KBS coatings. This was a real nice product to use, and is very durable. The top coat is sprayed wet on wet so there's perfect adhesion between the two products and no sanding in between.
https://www.kbs-coatings.com/KBS-Maxx.html