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Origin and Potential Causes:
Reaction of pigments from the original finish with solvents of the coat which has been applied on top of it.Contamination - usually in the form of soluble dyes or pigments on the older finish before it was repainted. (This is especially true with older shades of red.)Old finish not well sealed. Use of too much hardener in the polyester putty or filler. Insufficient mixing of the polyester putty or filler.
Prevention Techniques:
Test old finish applying a coat of the color on a small area if bleeding is likely to occur, if so apply sealer. Use only the recommended quantity of hardener when mixing the polyester putty or filler. Check quantity of hardener, mix by weight or use a dispensing machine.Mix all putties or fillers thoroughly.
Remedy:
Remove polyester and re - do repair. Sand, isolate the original finish with sealer and reapply the topcoat.
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