Rust-Oleum 249418-2PK Automotive Sandable Primer Spray, 12 oz, Black, 2 Pack

I recently switched from a grey primer to Rust-Oleum’s black sandable primer for all my 3D-printed helmets and props, and I’m genuinely impressed. First off, the price is great—this 12-ounce can won’t break the bank, even when you’re covering full-size pieces. I sprayed two light coats on a full-scale helmet and still had plenty left over for a half-scale mask, which felt like a real bargain compared to other brands I’ve tried.What really sold me was the spray consistency. The aerosol tip delivers a smooth, even mist every time—no sputtering, no drips, no frustrating runs to sand out later. Even on tricky curves and recessed details, the primer settles perfectly, filling in light layer lines without obscuring fine sculpting. It’s forgiving enough that you don’t need perfect technique to get a great result.But the best part? The deep matte black finish makes imperfections practically leap out at you once you start sanding. Any high spots, pinholes, or rough patches are instantly obvious against the dark background—something I missed for years when using lighter greys. That little bonus has saved me hours of worrying over unseen flaws and made my final paint jobs much smoother.If you’re serious about prop-making or automotive work on plastic—and especially if you’re on a budget—give this black primer a shot. It sands down silky smooth, bonds like a champ, and really highlights spots that need a little extra love. I’m sold: it’s affordable, effective, and has earned a permanent spot in my workshop. Five stars from this avid maker!

worked perfect for what I wanted. Easy spray nozzle, not too bad of a smell. Took three coats, but worked amazingly.

Good product but spray tip clogs easily. Make sure you spray something like a strong Isopropyl Alcohol into the hole of the nozzle and then blow into the cap to clear it out before storing it.

Good coverage and spray nozzle. Good paint consistency as well. The black color is also nice as it helped me spot any bald spots. Only thing is it honestly didn't make much of a difference when it came to helping the paint layer stick.

I use this as a guide coat and it works great and is less expensive.

Nice full can and was happy with the primer color of flat white. Good nozzle and pressure and can worked slightly upside down. I am pleased

Rust O'leum has always been a fine product, and this is no exception. The colors are always consistent and they don't fade easily, the texture is smooth, and the size is competitive. It is very good for resisting scratches, and clean up (within the directions) is easy.

Works and covers well