I have a number of used Radio Shack project boards that I would like to clean in bulk. I have removed all of the components, but stripping the solder with copper braid would be too tedious. I have a heat gun - would it be possible to hold the board with pliers, heat it with the gun, and wipe it with some sort of sponge? Would flux be necessary? Any ideas would be appreciated. I love these pre-printed boards and I don't think Radio Shack will be making any more of them.