A strange query for you - I'm having problems with the skin on the thumb of my left hand (right handed player). Skin is cracking and gets sore around the inside edge of the joint. Various creams aren't making too much difference but then I started playing my old faithful Faith guitar instead of the Larrivee for a week or so and the skin cleared up

Went back to playing the OM50 for a couple of days and the skin problem is back... Surely there can't be a reaction with the finish on the Larrivee?? It's a 2003 guitar so any solvent will be long gone.
Anyone else had a similar problem - I'm hoping it's just coincidence cos I don't think I could face having to part with the Larry!!