Polished Silver Coins

IT'best to leave these coins in the natural state,if you send them to a TPG service they will give it a grade with a cleaned designation,which definitely brings the desirability and price down

There is nothing that can be done to reverse it. Going forward, as you now know, don't clean any coin. That devalues the coin. Good luck.

Way, way to late to say this but coins should not be cleaned, ever. As others already mentioned, they should not have been polished. Polishing is even normally worse than just cleaning. Cleaning, as a general rule, just removes dirt, grime or just stuff on a coin. Some cleanings also remove corrosions which are a little part of the coin.
Polishing is when someone actually puts a polish or wax on a coin and polishes it with a cloth or even a buffing wheel. This leaves a wax or polish on the coin, wears away much of the surface and removing the stuff also now exposes a really worn coin. Yes they look pretty but just not what collectors really want.
If you go to a Museum you would notice many really old objects are kept from getting dirty but no one cleans them. Imagine sending a Mummy out for polishing or cleaning.
Check the tab for SEARCH on this forum for polishing or cleaning. I've experimented with those and have sort of returned coins to looking normal. They never will really be normal again, but much better.

They will be assigned a Genuine grade from PCGS and there will be a two digit code signifying the cleaning. NGC will be a general details grade, such as "AU Details", and ANACS gives a numerical details grade.