I just purchased a used cylinder head that has been ported, polished, valves un-shrouded, gasket matched, etc. This head has not been used since the work was done. As part of the porting/polishing work, the entire head has been painted silver. While it looks great, I am concerned by the fact that the top of the combustion chamber is painted, the bottom of the head, where the head would meet the gasket, is painted, and the the spark plug threads are painted as well. Is this is normal? I would have expected the bottom of the head to have been masked, so that it was not painted. Will the paint be a problem? I worry about the head making good contact with the gasket, and the paint burning off of the cyl head, and causing probs, and the threads being too tight on the plugs. Anyone?????