Matt:
If it's the glyptal, you wouldn't want to take it off the inside - was it on the outside also? BTW - check out the background - the stuff is really tough - originally developed by GE for insulating HV equipment - engine builders used to paint the the lifter galley area of engines to supposedly promote faster drainback of oil to the pan. IH used it to seal the sand castings, as the conventional wisdom is that sand cast parts never lose all of the sand, the paint seals it in FOREVER..