The under coat or existing finish is visible through the topcoat.
Common Cause
Insufficient number or/and film thickness of color coat applied.
Colors not well stirred.
Colors over thinned.
Topcoat over compounded or polished.
Substrate's color was not correct and uniform.
Inadequate lighting in spray area.
Prevention
(1) Use thinner according to recommended ratio.
(2) Stir color thoroughly.
(3) Use proper undercoat.
(4) Install adequate lighting device.
(5) Compound or polish in appropriate technique.
Repair
Apply sufficient coats of color until hiding is achieved. Or sand and repaint.
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