Arm rest? Polishing cloth? Pfft. A couple of weeks ago, at Camp Bluegrass, there was a guy in my class whose guitar had lost all its finish where the arm wraps around, and the area below the sound hole looked like it was scraped clean, too.
Guess who was the only one of us eliciting questions about his instrument (A 1959 Gibson) and compliments on owning "the coolest guitar in the room" from our instructor, Dan Miller, author of "Flatpicking Guitar Magazine?"