belt-buckle rash
n.— «Belt-Buckle Rash is actually the result of many factors; snaps, zippers and even the abrasive effects of denim will also result in finish damage. However, the most sinister threat to an instrument’s finish is the inconspicuous “Pocket Rivet.”» —“Guitarists Say Goodbye to Belt Buckle Rash” Modern Guitars Nov. 14, 2006. (source: Double-Tongued Dictionary)