I think that is is cynical and doesn't accurately define their behavior. Conserving things takes expertise, and often the expertise of more than a single individual or covering more than one knowledge domain.
The first thing I see is a very clear halo affect around all he devices which is pretty obvious evidence of cleaning.
Third-party grading services such as NGC receive quite a number of Capped Bust halves for grading and variety attribution. Some of these are returned without a grade for one or more problems with their surfaces. Perhaps the single most common reason for rejecting such coins is that they've been improperly cleaned or have artificial toning — oftentimes both. Capped Bust halves were recognized as being collectable as long ago as the 1850s. In the 19th Century it was common for both numismatists and the general public to clean silver coins with abrasives or harsh chemicals. Some such pieces have naturally retoned nicely enough to become certifiable, while many others have not. https://www.ngccoin.com/coin-grading-guide/grading-capped-bust-half-dollars/
https://www.empirecoins.net/index.php?l=product_detail&p=110415 - FWIW 1795 Flowing Hair Half Dollar VF Detail PCGS Gold Shield "VF Detail - Tooled" Pleasing light to medium gray color with full VF detail. The eagle shows nice feather detail for the grade, as so often it is very weakly struck in this area. There are many mint-made adjustment marks around the obverse rim from 2:00 to 3:00, and 7:00 to 9:00, and on the reverse rim from 10:00 to 12:00, and 3:00 to 5:00. Adjustment marks were done before the coin was minted. In the late 1700's and early 1800's, the planchet was weighed, and often scraped with a file to bring it to the proper weight and silver content. The coin was then struck, though usually most of the adjustment marks will still be seen. These are often mistaken for scratches, as they have a similar look, though usually run in a very parallel pattern. This coin also has a few light scratches in the central area of the obverse, which accounts for the "Tooled" designation given by PCGS. A big discount on this very scarce Flowing Hair Half Dollar that we rarely see! $1749.00
https://coins.ha.com/itm/bust-half-...f-details-mintage-5-873-660/a/132121-27283.s# Just to make to show that it was common with these coins.
It was done a lot in an attempt to raise the value of the coin to an unsuspecting buyer. But, it was never acceptable.
This is why hesitate to "clean" coins even with acetone. TODAY it is great , fine , super-duper! Tomorrow it might be OMG you didn't clean it did you??? "With ACETONE? OH NOOOOOO that USED to be good but not accepted now." One NEVER knows the future. Back in the old days coating the coins with Varnish and such was an accepted thing. Now it's a horrible thing to do. I'll clean a sticky dirty coin in the sink with dish soap gently if I find it in the dirt but that is MY extent of cleaning.
I have a couple Morga ns and a Peace dollar that was toned by seller. I like how they looked, even though I prefer my silver to be blast white.
I'm not much for a 9 year thread. It seems that we could better look at coins and talk of a specific thread. With a thread this long, it looses its original topic, probably more than once. I started reading it and left it aft the third page. Just my nickel!