Brent,
Not sure about the SKB 100, the Ithaca/SKB 100 has a very tough to remove black chrome finish on the receiver and barrels. I did restock mine, I'm satisfied with it. Another board member here has one case colored. Looks good. So yes, some customizing has been done. I was reluctant to go too far past the restock as I don't have the skills to do the metal work myself.

Good Luck!