Symptoms

Insufficient obliteration of the
substrate colour by opaque top coats.

Cause

• Contrast between primer and
  finishing coat is too large
• Too low coating layer thickness,
  e.g. on sharp edges and
  profiles - or too few coats
• Characteristic of the color
  (eg bright colours)

Solution

Clean and sand substrate.  Round off sharp edges.  Primt/undercoat with a suitable shade when using poor hiding colors. Completely refinish with top coats.