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PeelingPhenomenonA loss of adhesion or separation of the paint film from the substrate.CauseA. Improper preparation of the substrate. (Remaining moisture or oil)B. Applying incompatible products together. (e.g. urethane and lacquer types)C. Applying without sanding the previous paint film.RepairRemove the area wider than the damaged part and refinish.PreventionA. Clean and prepare the substrate th…

BlisterPhenomenonSwelling as bubbles or pimples in the film.CauseA. Applying over water, grease or oil.B. Rust on the substrate.C. Exposure to the high humid condition.RepairSand the swelling area or peel off to the substrate and refinish.PreventionA. Wash the substrate clearly.B. Have enough drying time between coatings.C. Remove the moisture in the air hose.

BlushingPhenomenonTemporarily or permanently, surface of the paint film loses gloss and becomes foggy or milky after spraying.CauseA. Fast drying solvent or unbalance of thinner could make moisture getting into the film.B. Air from spray gun and thinner drop the temperature of the substrate by the dew point andmake moisture getting into the film.C. Applying on a humid day.D. Using a lot of hydroph…

Water SpottingPhenomenonCircles with raised edges or whitish spots resembling water droplets appear on the surface of the paint film.CauseGetting wet or rained before the paint film thoroughly dried.RepairA. For severe spots, sand and refinish."B. For light spots, polish a panel using #2500 compound (1st step) and #7000 compound (2nd step)."PreventionA. Avoid the water or rain until the paint film…

MottlingPhenomenonSpotted or striped appearance in a metallic color.CauseA. Using the metallic paint with slow thinner or applying it too thick.B. Unskilled application technique of worker.C. Applying clearcoat too thin or too quickly after metallic color coating.RepairA. Clear the basecoat applied part and apply higher pressure mist coat.B. Sand the dried basecoat film and refinish it.PreventionA…

RustPhenomenonCoated film is partially swollen or peeled off by the rust of the substrate under the film.CauseA. Improper preparation of the substrate.B. Coating on the moisture.C. Water in the air hose.D. Low adhesion or rust resistance of the product.RepairRemove the damaged part on the substrate and apply the anti rust coating before the top coat.(Washprimer (DNU-800) + Primer-surfacer)Preventi…

GelationPhenomenonThe product changed from liquid to semisolid and has very low fluidity.CauseA. Low stability of the resin component in the paint.(Long storage at high temperatures)B. Mixing base with hardener.C. Mixing products that would not be mixed.D. Storing the urethane hardener with opened lid.RepairA. Discard the gelled product. (too high viscosity)B. If the viscosity is slightly rised, a…

Soft PaintPhenomenonThe paint film is soft to the touch, and will fingerprint or waterspot within hours/days after application.CauseA. Excessive film thickness.B. Low temperature and high humidity.C. Adding too much or little hardener to the paint.D. Using too much retarder thinner.E. Poor condition of the previous paint film.RepairA. Drying the film by heat.B. If hardener is not added, remove the…

CrackingPhenomenonCracks or lines of various lengths and widths in the topcoat finish often resembling the cracking of dried mud.CauseA. Excessive film thickness of the undercoat and/or topcoatB. Paint ingredients not thoroughly stirred or agitatedC. Insufficient flash time between coatsD. Using the paint with low crack resistanceRepairRemove all cracked paint film and refinish.PreventionA. Take s…