Reading this with intrest ...people seem to be confusing issues here . 1. Cleaning enhancing or restoring a record you own is not a crime , plenty of people have antique clocks and the like done . 2. Selling something that is second hand that may of been enhanced is also not a crime again plenty of people polish scratches etc. on a cars paint work before they sell . May not be very nice but its a "buyer be aware" scenario im afraid .
All that said I do agree that if a record is described as mint- I would expect it to be this way ie: naturally without blemishes- not enhanced ! personally if i purchased a record from a dealer described as being mint , but I suspected being skimmed or polished I would just ask for my money back , most proper dealers will do this. I f they dont you aint buying from them again so in the end they are the losers.
Finally a word on the practice of skimming . I have skimmed or experimented with skimming hundreds of records over the years . not for dealers or to sell on I would add ...before someone says " I BET " here is the reason why- skimming records is just too inconsistent with the results to bother .
1. Forget skimming styrene it gets too hot and will affect the playing surface
2.. It will not remove sratches you can feel with your fingernail or jumps or clicks.
3. Over skimming will affect the run in a dead give away it will jump quickly into the track also if you skim into the run out it will go misty another give away.
4. There are so many different grades of vinyl out there some poor some good again inconsistent with skimming results.
5. British vinyl is usually good quality and responds well to skimming. Be aware if you collect this stuff.
6. If you buy a record that looks over shiny , simply wipe round the vinyl with a strong mix of washing up liquid and wipe off dry with a tea towel it will soon undo enhancing and then reveal skimming.
In truth the best that can be achieved with skimming is taking a record with light scratches that is say vg/ vg+ to maybe ex/ex+ its not really gonna make it that much better just take the edge of a few crackles ....my advice leave well alone or save your money and buy mint from someone reputable