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Old 09-26-2012, 04:39 PM
69 widetrack 69 widetrack is offline
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peeling paint

I have been an automotive paint rep for 30 years. In the majority of times a peeling problem comes into the equation the problem is flash times. If you use a waterborn product or solvent flash times are crucial. It doesn't matter how long the manufacturer says paint should dry or how long you let your basecoat dry what matters is, is it dry? Slow reducer, cool temperatures, low hiding colour, side panels coming off in sheets all these tell me that the base was not completely dry. It may feel dry, however top panels will dry quicker than side panels as evaporation moves up, side panel would obviously take longer to dry. If not dry and clear coated with the clear coat using a catalyst (hardner) the clear will not just dry, it will cure. What happens to all the un-evaporated solvents in the base coat??? They want to come out, but the only way is to take the clear and in some occasions the base with it. Easy test...peel some clear coat of a painted panel, if you can smell solvents that means the solvents where trapped between your base coat and your activated cured clear coat. How to avoid the problem in the future??? We sweat to cool us down, if you like your finger and stick it in a breeze is it cooler? Same thing with paint, solvent or water born on metal has the sam effect. Feel your painted panels and feel the side of the both or a panel that has paint on it bit not recently repainted. They need to be the dame temperature. When they are. give your base another few minutes and continue with your next coat and avoid putting heavy coats of base on "low Hiding) colours, your only slowing your process down and asking for problems like this. hope this helps...69widetrack
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