I'd like to give a watch to a friend as a gift, and would like to have the watch etched. The caseback was recommended to me, however the watch is an invicta and it has a large invicta design on the caseback. Is it possible to polish the back and then etch it? or should I try somewhere else on the watch? Also how does one go about finding a place that can etch watches? I was thinking of going to the diamond district of NYC and just stopping in every store to ask.