Stan: what I got out of the wondeful list of old posts here that Dr. Drew provided (wish I could search that effectively here) was that the destructive component of natural light here (i.e. sunlight) was UV. Ultraviolet light is a known force in many processes now (and has been for most of my lifetime). How it exactly diminishes the beauty of bone-charcoal hardened finishes over time still excapes me however.

Last edited by Lloyd3; 01/17/24 02:44 PM.