I recently acquired a Uberti Walker that the previous owner appears to have filled all the markings and cylinder engravings with a white filler that made them contrast well and pop out. It was probably for show as it didn't look to have ever been fired. A good deal of the filler has come off after shooting and washing it up, but I thought it looked pretty cool and was wondering if anybody knew of anything that might have been used or is made specifically for the purpose of making engravings stand out better. My google searches so far haven't come up with anything. Thanks!