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Problem

What grit for outboard motor cover before painting?

Paint on an outboard motor cover can peel or show scratches if the plastic or fiberglass is not prepped correctly.

plastic paint primer dry sanding
Answer

For an outboard motor cover, clean first, scuff with 320 or 400, then use 600.

Why it happens
Motor covers need cleaning, degreasing, and fine scuff sanding before primer or paint.
Recommended grit
Use 320 or 400 for scuffing, then 600 for smoother visible paint prep.
Wet or dry
Dry.
Success check
The cover is clean, dull, and ready for coating.

What to do

  1. Clean grease, salt, and residue from the cover.
  2. Scuff with 320 or 400.
  3. Use 600 for smoother visible prep.
  4. Remove dust before primer or paint.
Avoid: Do not paint over wax, grease, or salt residue.

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