Staining / Plastic Bleed Through

Cause

•   Using too much or too little hardener in the putty/filler

•   Insufficient mixing of putty/filler components.

•   Applying a surfacer, sealer and/or topcoat before putty/filler has thoroughly cured.

•   Applying undercoats and/or topcoats excessively wet.

•   Clearcoating a white or light color without using a stain-free body filler.

Repair

•   Allow topcoat to thoroughly cure.

•   Sand affected area, isolate with two component undercoats and refinish.

Prevention

•   Use correct amount of body filler hardener.

•   Mix components thoroughly.

•   Allow putty/filler to cure thoroughly before topcoating.

•   Apply undercoats and/or topcoats in medium-wet to wet coats; always allowing proper flash time between coats.

•   Use non-staining body filler, especially when clearcoating light colors.

•   Isolate suspected staining filler by applying a two-component surfacer and sealer.* Allow to cure, following product recommendations, then apply desired topcoat.

* Two component acrylic urethane primer surfacer and acrylic urethane sealer may be used to top a majority of body filler staining problems. Both are required and must be allowed to fully cure for maximum stain resistance. However, for 100% assurance against body filler staining, use a non-staining body filler according to manufacturer's recommendations.