And how do you clean them ?
I WOULD JUST USE THOSE EYE GLASS CLOTHES AND WIPE VERY GENTLY AND THEN PUT THEM INTO THE AIRTIGHTS........
I used the finest silk on a silver coin and it is scratched forever under a 12x led loupe
I have only experience with acetone on gold and in order to view no deposit the acetone needs
to be at 22C roomtemperature to flash off and even then repeated washes with distilled water may be needed to see nothing under 12x magnification
When using acetone wear unlubed surgical gloves and have enough ventilation
otherwise your fingers will turn frozen white and you may have an headache for a day
Been there done both