I have a Rolex GMT that I purchased in 1968. Had it serviced about 4 or 5 times always at Rolex NYC . Don’t think I ever asked if they we’re polishing the watch. Don’t think so. I been using renaissance wax on it for years. Looks new. So I’m assuming no polish. I guess this is an issue but I think if done correctly the issue is a relatively small one. Just my 2 cents.