The Pietta gunfighter models have white or black polymer checkered grips. I have ivory polymer grips on my engraved Pietta Frontier revolver and my nickeled Pietta Pistolero.
Cayenne pepper works. My MIL's bird feeder was always being raided by deer until we put cayenne pepper in the feed. Deer won't touch it but it doesn't bother the birds.
The only issue may be fouling buildup in the gap between the case mouth and the start of the rifling, similar to the issue with .38s in .357 cylinders.