Welcome!
About your kydex issue... it shouldn't affect the Res-C. Upon repairing a cut ini the Res-C, it'll take a lighter in close contact at least 10-15 seconds to melt and mend the cut. I don't think the kydex will get that hot.
Hope you stick around here! <img src="/ubbthreads/images/graemlins/thumbup.gif" alt="" />