I still get nailed on cleaned coins. I've several from ANACS where I cannot figure out why they decided it was 'cleaned'.
Loss of luster (too much dipped) too bright and surface is color flat looking (whizzed) scratches going against the common metal flow (whiped) vs dings and hits, etc. if you look under a loop you can see various scratches. Maybe the way "dirt" or unneutralized chemical cleaning is around stars, etc. I started learning about proper cleaning techniques in this thread ==> https://www.cointalk.com/threads/1876-trade-dollar-get-it-cleaned.276689/ but there's many identified as "cleaned" that I really don't know.
Just for fun this spring I told Siri on my phone to call me "Jim V., the smartest and strongest man in the world". The was really neat until I realized it was inserting that as text in all my personal and business emails.......
This is ONE reason I ordered a microscope with four light zones - so I can switch light directions on the fly and catch cleaning lines.
No. I handle all emails myself. I just didn't know that fooling around and having Siri call me that would automatically insert it on all correspondence I sent from my phone.
So you can leave the coin in the same spot, but flip through all 4 lighting positions, and capture cleaning lines reliably? This is interesting.
I buy one low grade Peace Dollar and suddenly I'm a cheap-skate? Coin collectors are a very judgmental group.