I use a DSLR so I can change some things a little bit, make the coin look as close to the colors on the coin. It is called processing. This would be defined as a restoration. I did not disturb the original surface. Although they could for any reason details the coin if they don't like the surface, A small amount of corrosion left would also detail the coin. The original green could be seen with your eye. No magnification or special light needed.
One should never need to manipulate a coin image. If you're not getting it right, then your light is off. I take my pictures with a cheap Canon SD700IS and a $40 desk lamp. The only post processing I ever use is a crop and resize.
Better be careful or Thad will come up with a costume for you to wear and have you do a TV commercial for him. LOL
Perhaps just me, but a coin is "cleaned" when it looks cleaned or when you just clea..... conserved it. I think the usual suspects are 1) parallel brush marks in the fields or devices or 2) build-up of residue around devices.