Seems like half the comments I get on my ring Videos are telling me that what I'm doing is illegal. Let's clear this up, shall we?
What the U.S. Treasury says about it. http://www.treasury.gov/resource-center/faqs/Coins/Pages/edu_faq_coins_portraits.aspx
Here's a few ways on how to do it-
https://www.youtube.com/watch?v=7Q8aokoIH9Y
https://www.youtube.com/watch?v=hODHnrKYn7Q