Polishing stems

So I have some pipes. Some old pipes and I have a problem. I've taken off some logo stamping on the stems by sanding, polishing and buffing. I'd like to keep the logos on the stems. What I've done to try and rectify this was to get a paper hole puncher and some tape. I punched out a perfect little circle of tape and put that over one of the logos. I then proceeded to sand, polish, etc. Now one of my pipes has this circular spot of oxidation around an intact logo but... I'm sure you can see what I'm getting at here. It's a Dunhill. It smokes great with a shiny stem but it's a friggin' eye soar! I have three pipes ready for refurbishing and I don't even want to start because of this issue. There's a Stanwell, a Charatan's and a Savinelli up on deck. The Savinelli has two gold spots for a logo. I might be able to handle that one carefully and not lose any of it. The Stanwell and Charatan's are intimidating me because of all the tiny little spaces in between the peaks of the crown and the lettering. I use oxiclean, a magic eraser, sand paper, micromesh and a cheap buffing wheel attached to a drill with two types of buffing compound. Sometimes the trouble begins in the oxiclean. I had another Stanwell logo just disintegrate in the oxiclean bath. I was left with a Stanwell indention on the vulcanite with no color to it. Does anyone have any tricks up their sleeve pertaining to my dilemma?

It's a shame to leave them like that. I'm going to try the Vaseline and bleach. We'll see how that works out. Maybe a larger buffing wheel and a lighter touch will be the answer. Practice with trial and error is going to have to do.
Thanks for the input gentleman.
The Savinelli is not a Punto Oro. It is a Nonperiel. Looks like an older one. 50's? 60's? Possibly 70's. It's numbered 9904 if that means anything to you. The dots look to be inlaid brass but I need to inspect them closer.

I guess I'll go with an easier touch and hope for the best. Keep a jar of paint near by. I'm thinking maybe some white epoxy. I can mix up a dab, mash that into my Stanwell and clean off the excess. I'll document that and put some pics up when I get to it. If all else fails, I have someone to send it off to fix it. I'm a man who loves a back up plan! Thank you all... This forum is better than facebook! Much more interesting and wise folks here!