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I was wonder how I would go about painting my magnesium valve covers. The problem is when they get hot they release gas and even the stock paint/coating on them had a bubble in it. Should I just do a high temp primer on them, then BC and CC? What I want to do is to make them match the exterior of the car, and there is a stripe on them with text, whcih I want to do that in the alsa killer chrome. Its on a 4.9L cadillac engine, so they do not make aftermarket valve covers that are not magnesium