I posted this earlier but it disappeared, so I will try again. I've been doing some learning on telling if a coin has been cleaned... and I do know this. High Grade coins will have a "cartwheel", cleaning removes this cartwheel. If a coin has been retoned, usually the toning lacks contrast and is very evenly distributed. However I still find a lack of understanding on this. If a coin has been cleaned say 60 years ago, usually it will retone back to normal as far as toning goes. But on a lower grade coins, say F or VF, there is scratches on the coins from circulation, and there are scratches from cleaning. So if a VF coin was cleaned 60 years ago, retoned back to normal, how can one tell scratches from cleaning and scratches from normal wear like circulation?