Has anyone ever used one of these things before. It may be good for corroded motherboard traces.
They're not all that great. I have that exact same one. If you get it, make sure to shake the hell out of it before you use it. Works pretty good when you need to fix a broken/oxidized trace on a membrane keyboard flex pcb (and in that case it's probably your only option). If it's a broken trace on a piece of FR4 I wouldn't even think about using a trace pen. Fix the trace with a piece of wire wrap.
