The old paint payer was a primary color (red, yellow, blue), which have a tendency to penetrate or bleed through the topcoat.

Body filler not allowed to dry sufficiently.

Tar, etc. adhered to basecoat.

Paint a small spot to test for penetration or ‘‘bleed’’.

Allow body filler to dry thoroughly.

Completely remove tar, etc. from the surface being painted.

If the symptom is not severe, apply sealer or urethane type primer surfacer and force dry. Then repaint.

If the symptom is severe, strip off the paint, then repaint.