Don't Repeat DON"T use any of the strong chemicals near your scales...just a hint acetone and anything with naphtha will eat scales, trust me that's how we pop inlays to re-do them..... I just dissolved some old DD scales to pop the brass inlays this week.....
WD-40 will take the goo right off the spine and I have never had it hurt any of the scales........ Vintage or custom