Sometimes the ONLY way I can get the circular nameplate off the front of a lens (for cleaning and removing helical grease from old lenses) is to drill tiny holes, 180 degrees apart, on that circular nameplate around the front element. It's risky and demands precision but it can be done. This is done after using wads of tape and a scissors to try to unscrew the disk manually.

What can be put into the holes to make it look like no drilling was done or, at least to mitigate the visual effect? It really does not matter what color the substance is because after it dries I could paint it black. I need info for both plastic and metal circular nameplate disks. Thanks. - David Lyga