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Primer not sticking to resin hood

RELATED TOPICS: PAINT | PRIMER | RESIN | HOOD
Q: I am working on an Olds 442 collection (1966 through 1972) for a show in Massachusetts next year.
The problem I have is with the 1968 conversion kit, which has a resin hood. I sprayed everything with automotive primer, but when I taped off the hood, the primer did not stick. It’s fine on the body. I’ve painted a lot of cars with O.E.M. paint, and this is the first time I have run into this. Any suggestions would be greatly appreciated.

Ken: Because you’re working with resin, it sounds like the hood has a case of Residual Mold Release. It’s important to wash all model parts – plastic or otherwise – before painting, but it’s especially critical with aftermarket resin.

Mold-release agents used in the casting process can vary between manufacturers, and even batches, and paint just won’t stick to greasy surfaces.

To fix this problem, soak the parts overnight in Westley’s Bleche-Wite whitewall cleaner, then scrub them with a liquid dish detergent such as Dawn. You might also want to scuff the pieces with fine sandpaper, so the primer will have something to grip.

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