WASHING MACHINE

 

These coins start at 25.9 grams. They have been soaking in DW, so there should be no weight gain to water.I am going to put them in a media filter bag (small nylon bag with tiny holes for fish filters) and throw them into the washing machine with a blanket that needs to be washed. I'll tie the bag up securely, so the coins don't bang around too much. I'm sure some dirt will be removed... but how much and how safely remains to be seen. Using a scoop of Oxy Clean and some All detergent; hot water setting. Don't tell your wife if you try this at home!

Before:

And after:

Coins still weigh 25.9 grams. Not much dirt has been removed. Not a waste of time, but not worth attempting again either.