I want to be a coin doctor

Haha, just kidding.

More specifically, I want to learn the techniques that coin doctors
use so I can try them out on some common coins and see the results for
myself, rather than as pictures in a book.

How and where do I go about acquiring this type of knowledge? What
would I need to know beyond detailed knowledge of the chemistry of
coin metals?

As a related question, I know the ANA has an extensive collection of
counterfeit and altered coins used for educational purposes. How does
one go about getting access to study them? And, do they have examples
of cleaned or resurfaced coins in addition to altered/counterfeit
specimens?

Thanks, all.

Paul

They show these at the counterfeit detection seminars in Colorado Springs