While cleaning/polishing my nitro-finished guitar today (with Preservation Polish), I noticed that the area where my forearm usually rests has dulled. Before cleaning I assumed it was dirt/grime on the surface, but it's actually a dull spot in the finish.
Is this normal or am I sweating acetone? I'm sure it can be buffed out, but I was wondering if this has occurred to anyone else.
Thanks,
Mike