the ring I am talking about is on the very end of the extended lens. Basically the final trim ring or outer ring on the lens. Part shown in PIC is dinged and arrow points to the ring I would like to replace. I know, it is just cosmetic but, I want to see if I can repair. See PIC. So question is, how do I remove this outer ring cover. Canon sells this repair piece.
The answer is that the ring is an interference fit and is literally pulled off the end of the lens. I had an opportunity to disassemble a complete G16 lens and found out. The shutters are held between this "cap" and the second part of the lens. I think it was easier w/ the lens apart as you have something to hold on to versus pulling up on the entire lens. Still, it just pulls off.