Sanding Marks

Sanding marks from the substrate or primer become visible after the paint surface has dried.

sanding marks

Cause:

  1. Incorrect primer preparation: insufficient amount of filler or low-quality filler, and sandpaper that is too coarse.
  2. Poor sanding tools or incorrect sanding technique.
  3. Topcoat layer is too thin.
  4. Sanding flat surfaces without a sanding block.
  5. Primer layer too thick before applying topcoat and insufficient drying time for the primer.
  6. Incorrect preparation of the old paint surface.

Correction:

  1. Sand with very fine sandpaper and polish the surface afterwards.
  2. If the scratches are deep, sand down the paint and repeat the process.

Recommended products to prevent and fix potential issues:

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