I have just added a discussion about the 4 time NASCAR Sprint Cup Champion's signture structure and signing habits. I wanted to get this information out because of some recent problems where a couple of Non-NASCAR specific authenticators have been failing authentic Jimmie Johnson signatures. You can find that discussion here

http://live.autographmagazine.com/group/nascarautographs/forum/topi...

Feel free to add to the discussion and please show any examples of your own.