i just acquired my first vintage flight jacket. It is in good shape but is a little musty smelling in the Dynal collar. Stopped by a dry cleaner to inquire about cleaning. There are a few small moth holes in the waistband and and the cuffs have a larger hole from wear, possibly from stretching the collar over a watch on the left wrist when taking it on and off. He said there is a significant chance the waistband and cuffs could be damaged further and frayed if sent out for cleaning. Is there a way I could hand clean the dynal collar? What is the best way to do it? The liner and the rest of the jacket doesn’t smell too bad. If I get the collar clean I would be very happy.