Or if you really want to mess with them. Give each one an acetone bath and release back with no markings.
the whole purpose of marking them is to see if they have been already searched. which makes no sense to me because you will not be able to see the whole roll when researching them again.
Better way is to dip them and remove the marker, then spray paint the edges silver and redeposit them lol.
I really don't like to see the marked coins. It takes time to do that and just because it's not collectible to you doesn't mean that someone else doesn't want to collect it.