Cleaned vs dirty, question?

[Dozer D]

I know that we are all NOT to polish & clean coins, but is there a way to reverse the process and make a coin 'soiled dirty' to make it look aged?
Reason I ask, the other day an older great-grandmother type woman gave me about 25 polished & cleaned AG Rosie's at face value. She said that they belonged to her late husband and knew that I collected coins. Nearly all were showing signs of being cleaned. My question is: is there a way or process that can be applied to make the coins look tarnished/dirty & old looking, vs the polished look. I took the coins only because of their silver value, didn't have the heart to tell the woman that "coins should not be polished" and are now ruined. Comments & or suggestions.

 

[Liu21]

Question is, are any of those rosie worth more than melt value? and I dont mean the 25-50 cent premium some people charge...

 

[MIhunter]

I am not aware of any way to unpolish or unclean a coin

Silver FDRs are generally worth face value unless cond is AU or better so she probably didn't ruin anything.

 

[villagenut]

Depending on what you are calling polished...They may just be uncirculated coins,;or even better, proofs.

 

[fistfulladirt]

Burying for 30 years may help.

Or place on a windowsill in the sun to encourage toning. There are other ways to accelerate artificial toning and simple internet search can give good info.