I was at the barber last week and one of the customers was on the topic of how he plays guitar a lot and has arthritis in his wrist and thumbs. He was on a diet of OTC stuff asprin Ibuprofen with no help and he heard about using WD40 several years before so now when ever he decides to play he sprays his wrist and thumb joints with WD40. He said it keeps hisjoints in good shape and he only does it about twice a week. Does not seem like it would be the safest thing to do at least long term. Seems to me it would be toxic, I will not try it. I know WD40 can be used for many things, but I have never in my 58 years on this planet ever heard of spraying it on arthritic joints. Anyway anyone else on here ever heard of using WD40 on arthritic joints?