Rust-Oleum Automotive Sandable Primer Spray, Flat Black | Rust Preventive | Fast Dry | Wet or Dry Sand | Sands Smooth | Comfort Tip | Any-Angle Spray

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!

Quality product with good coverage.

Works great and great coverage

Picture is misleading. Paint is DARK GREY. Cap is an almost black color. But other than that it is good paint.

worked perfect just enough bottles for my car

Great product.

Love Rust-Oleum always. This stuff is always my go to for a black primer..can also use as a matte top coat. As long as you seal it with matte clear it comes out awesome as a top coat. Almost a satin. Fast shipping and great price!

I'm a cosplayer and I'm frequently making props and accessories for my next costumes, which heavy relies on post processing of my 3D prints. This fills in all the print lines while also laying down primer for your paint. It dries in a chalky layer that is easy to sand and won't come off in flakes. The color is a great neutral base to paint over. I recommend going in with a light hand as this stuff is thick and very covering!

I've bought this over and over again because it works like a charm

Good quality and fast delivery

Excelente producto!

Really good quality paint. This one in particular adheres very well and does what it says. Really happy with my purchase and considering buying more.

Not sticking to 3D printed parts in PLA.