Hello everyone. I have seen various posts on color filling and debates on taping but none that specifically answer my questions. I am engraving some slightly curved wine glasses. The issue is trying to color fill the lettering. I have used tack paper both as a full piece wrapping around the glass and as small strips so the tape doesn't wrinkle on either side of the bulge of the glass. Either method has resulted in it's own set of issues. I also have been trying rub n buff with mixed results. It very easily comes out when I lightly buff, despite the various types of buffers I have used. So does anyone have a recommendation for how to engrave/mark the glass and fill it in properly? Thank you in advance.