Hi! As I'm about to tackle the repair that some around here insist upon calling a **** fix, I have a few details I want to clarify, mainly about the roughening of the surface of the metal so that it bonds well with the epoxy. I bought a high-carbon-steel wire brush, and I experimented with it on an uninvolved area of the pipe to see what it would do to the surface. It appeared to make some very superficial scratches after a few strokes when I applied modest pressure. So my question is two-fold: First, part of the epoxy will be applied to the thread of the pipe. Does pipe thread qualify as an already-non-smooth surface so that I needn't use the wire brush on that portion of the metal to roughen it? Or are the threads too 'macro', and should I nevertheless use the wire brush there to create smaller (even microscopic) imperfections in the thread surface for the proper roughening that will promote epoxy bonding? Second, the other part of the epoxy will be applied to the fixture tightened around the pipe and just above the leak, and that definitely is smooth and needs to be roughened. But how much roughening should I do? How deep, how numerous should my scratches of the surface be for an ideal repa-- er, I mean **** fix? My final question is: Are there any tips about this procedure that I ought to know in order to create a tight, leak-proof bond that outlives me and -- much to his frustration-- frodo by a hundred years?