The best way to artificially tone a coin is not to try. While natural toning is valued by many collectors, anything intentionally done using heat, chemicals, etc. will reduce a coin's value.
One way you can tone a silver coin (which is a slow working method) is to put it into a manila envelope and place it on your windowsill. I've heard it can take a few months until it finally tones, but it works.
You mean ARTIFICIALLY INSEMINATED ? (A correct question is the best way to get a correct answer)
10 pound is the thing
Tone
The best way to do that is to take it to a coin collector.
The best way is to rub ketchup!
magic coin tricks are a sleight of hand, best way to learn is as an apprentice.
steroids!! lots of steroids!!
The best way is to do a Google search.
The deposits on the surface of the coin were part of the coin body. Removing these deposits is removing part of the coin. A coin collector will not do this.
put it through your computer
Reflective and Descriptive (APEX) !/