Let's get to the bottom of this, Cal! Rust-Oleum Automotive Filler Primer is a hi-build formula that fills in minor imperfections in the surface and improves topcoat adhesion and appearance. It is suitable for use on metal, wood, and fiberglass surfaces. Please keep in mind that it is recommended to apply 2 or more light coats a few minutes apart.
Rust-Oleum Filler Primer, Gray
Average rating:1out of5stars, based on0reviews
Fills up sand paper, I have even taken a pocket knife and scraped the primer off the sand paper, I won't buy this again.