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Problem

What grit for spot putty?

Spot putty repair can show ridges or sanding scratches under primer or paint.

paint primer dry sanding scratches
Answer

For spot putty, shape with 220 or 320, feather the edge, then use 400 before primer.

Why it happens
Spot putty needs gentle leveling and feathering before primer.
Recommended grit
Use 220 or 320 to shape, then 400 before primer.
Wet or dry
Dry.
Success check
The repair edge cannot be felt and the scratch pattern is ready for primer.

What to do

  1. Let spot putty dry fully.
  2. Level lightly with 220 or 320.
  3. Feather the repair into the surrounding area.
  4. Use 400 before primer.
Avoid: Do not sand soft spot putty before it dries.

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