Bleeding

Also known as: bleed through, staining, stains

Description: Original finish color or peroxide hardener from polyester body filler seeping through the topcoat, causing a discoloration of the new finish.

  • 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