Cause: A) Using too much or too little hardener in the putty or body filler.
B) Insufficient mixing of putty or filler components
C) Applying a surfacer, sealer and/or topcoat before putty/filler has thoroughly cured.
D) Clearcoating a white or light color without using a stain-free body filler (RAGE Gold).
Repair: 1) Allow topcoat to thoroughly cure.
2) Sand affected area, isolate with two-component undercoats and refinish.
Prevention: A) Use correct amount of body filler hardener
B) Mix components thoroughly.
C) Allow putty or filler to cure thoroughly before topcoating.
D) Apply undercoats and/or topcoats in medium-wet to wet coats; allowing proper flash time between coats.
E) Use non-staining body fillers (RAGE Gold), especially when clearcoating light colors.
F) Isolate suspected staining filler by applying a two-component surfacer and sealer.
Allow to cure, following product recommendations, then apply desired topcoat.
For all your automotive paint and body shop supplies: 66 Auto Color