Symptoms

Contamination of the substrate
(e.g. silicone, grease, wax) causes
surface defects   This results in areas
where the coating does not form
a complete film over the substrate.

Cause

• Usually a (silicone)
  contamination
• Insufficiently cleaned substrate
• When spray-applied: poor film
  formation

Solution

Sand thoroughly. Clean surface thoroughly with a suitable emulsion cleaner or silicone remover.  Finish with one or more topcoats.