Sweat from your bare arm can damage the finish on your guitar. To
prevent this, I keep a polishing cloth in my guitar case and drape it
over the guitar all of the time while practicing or else wear a long
sleeve shirt. This cloth doesn't have to be store bought or anything
special. A cloth made from a white 100% cotton T-shirt works just fine.
Bob, Gman ( o )==#
Baby Your Guitar With The Right Polishing Cloth.
Don't buy special polishing cloths for your nice acoustic guitar. The best (and cheapest) polishing cloth is BABY DIAPERS. Needless to say, these are absorbent and soft--
perfect wiping down your "baby." One pack of cloth diapers should last you for years. You can get them at any discount store for a few dollars.
I hope this is useful.