Bleeding

• Posted By : Bill
• 17th February 2016
• Classroom Kits

Cissing, Craters, Fish Eyes, Saucering

DESCRIPTION
Discolouration of the topcoat, either in the form of a halo, or, in severe cases, a complete colour change. This defect usually only occurs when spraying over red or maroon paint.

CAUSE
Absorption of pigment from the underlying paint, dissolved by the solvents of the new coat.

PREVENTION
a) Test the original finish by spraying a small, flatted area.
b) Use an approved bleeding inhibitor sealant.
c) Remove any overspray from the surface before painting.

RECTIFICATION
Rub down to the original finish, seal with a recommended sealer and repaint.