I'm fairly new at diy audio. In re-habbing a large, vintage tape deck, I managed to put a small scratch across the solder side of one of the printed circuit boards; it's a small,narrow scratch, but the copper trace can be seen. Probably not worth messing with, but I'd feel better if I coated it with some compound. Did a little research, but nothing is showing up. Would appreciate advice on how others usually handle this kind of problem?
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Or leave it alone. That coating is called solder mask. When they solder all the parts on the board, they use a wave solder machine. Basically it is a large tub of molten solder, adn they skim the board across it, soldering everything at once. They paint this stuff on the board to cover the copper where they don;t want solder sticking, otherwise they waste solder and potentially can cause unwanted solder bridges. You won;t be wave soldering.
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