Can you primer over 320 grit?

The guideline says you can sand the primer with 320 grit sandpaper before applying a urethane color coat. The guideline also says you can optionally wet sand with 400-600 grit. I’ve always sanded the primer with 400 or 500 grit before applying the final coat.

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Secondly, can you base coat over 320 grit?

Some people even paint over 280 grit-sanded surfaces. Personally, I like to stay in the range of 320-360 which is a good grit to paint over. In this range, it’s completely safe to go painting single stage enamel.

Likewise, can you prime over 180 grit? The primer surfacer should “stay open” longer, he said. Ryan said that by taking a surface to 180 grit or finer before applying primer, top quality primers should fill the surface without issue. Problems arise only when a primer is asked for “too much work” and to fill a deeper surface, he said.

Correspondingly, can you prime over 80 grit sandpaper?

120 is fine. I prime over 80 grit to 120 bodywork all the time with no shinkage. I feel 180 is to light for proper adhesion with primer.

Does primer need to be sanded?

Primer should also be sanded before the paint goes on the wall; for a top-notch job, sand between paint coats, too.

Should I wet sand after primer?

It is no longer considered good practice to wet sand primer due to risk of trapped moisture. If you want to dry sand primer you should use a sandpaper designed to be used dry only (not Wet&Dry which will clog quickly and risk scratching the primer).

What grit sandpaper do I need for automotive paint?

Dry sand using 180-grit sandpaper to remove rust or surface damage before moving on to a 320-grit paper to remove your previous 180-grit scratches. Whichever method that you decide, follow it up using 400- to 600-grit sandpaper to sand the paint to prep the existing paint surface for the new coatings to be applied.

What grit sandpaper should you sand primer with?

Great Paint Repairs Start With Sandpaper

Grit	How It’s Used
320 grit	For final polishing sanding before the primer coat. Also good on spot putty.
400 grit	Used for rough sanding primer. Also used for fine sanding spot putty.
600 grit	Used for final sanding primer before applying the basecoat color.

What should I sand primer with before painting?

Sand the Primer

Let the primer dry completely, then sand it down before painting. Use very fine 220-grit sandpaper, and apply light pressure to prevent gouging the primer.