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Black 1-shot problems

Discussion in 'Hand Made Signs' started by Zendavor Signs, Oct 4, 2017.

  1. Zendavor Signs

    Zendavor Signs Member

    Mar 3, 2011
    Peoria, IL
    We are having problems painting 1-shot black lettering enamel onto this sandblasted HDU foam sign. The black remains tacky for a long time (days) and gets very streaky looking. We have painted hundreds of signs before and never had this problem. It looks like some kind of contamination, but what? We primed the HDU foam with Matthews 6001SP polyester primer, then painted the entire sign with the background color, a Matthews satin color match. Then we applied the 1-shot color on top. The reflex blue lettering came out perfect - as normal. We have stripped the black paint and repainted several times, this last time we went down to the primer - still getting the same results. BTW, we tried 2 different cans of black 1-shot lettering enamel - 1 purchased recently and 1 purchased a year ago - same exact results. Brushes are either brand new or very clean. We have tried no reducer and a small amount of 1-shot reducer - again, same results. Help!

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