Very Smart John. I recommended a dremel with a metal cutter but installing the correct tap stem in the crown to prevent crushing the stem extension which is was more deilicate that you would believe with no stem inside to support it and then chucking it up in the dremel and working it that way sounds even better. Just keep the speeds down bellow 4 I say and you can keep dipping the crown in cool water to keep the heat out of the metal if you want though I think it would take a lot of heat to discolor stainless steel.I would put the crown in the Dremel chuck and polish the logo off using various grades of 'wet and dry' abrasive paper, working up to 1200 then metal polish......./
Absolutely it MUST have a stem threaded all the way into the tube or the tube will just crush.I like John_D's idea and i do have a dremel but i find that one wrong move and I can do irreversible damage . I personally would put a stem in it , use a pin vise to hold the stem and crown , put the pin vise in my table vice and carefully use a fine jewelers file to concentrate on removing the logo only . Then use fine grit sand paper to remove any file marks....I use 2000 grit , rubbing compound and water to fine sand crystals....and then a final polish with my cloth polishing wheel and jewelers rouge or compound . The polish part only takes a couple of passes so you don't heat up the item .