Advice on paint defects

Pinhole Marks

Definition

Small holes or craters in the new paintwork as a result of solvent boil not removed properly from the substrate (old finish).

500 x magnification Thin section of pinhole Thin section of fault Pinhole in white

Causes

  1. Solvent Boil or aeration of the old paint finish.

How to avoid

  1. Either sand out the holes/craters completely or, where possible, fill the holes.

Repair

Pinholes or small craters can only be repaired successfully by thorough sanding of the substrate or by filling the areas if practical or desirable.