Madacide is corrosive to certain metals, so you'll want to be judicious in it's use. spraying a coil machine down with madacide after every tattoo could eat the finish off and contribute to rusting. I'd recommend using alchohol to remove any madacide residue after said spray down. I don't bag my machines, not that I think there's anything wrong with it, but my machines don't spray pigment all over the place so it's unnecessary. getting in there with a q-tip is also good.