There's a helpful DVD by Kyle Katz on Skunks specifically:
http://www.kaatzbros.com/products.php?start=0&order=products_title&op=details&id=1858. Also, if you join your state's trapping association, they'll have skinning and fleshing seminars at their conventions which gives you a chance to see up close how the process is done. If you really want to go crazy, get a 3000 psi pressure washer and you'll flesh pretty much anything (except beaver) super clean and amazingly fast. Check out Brian Harness' DVD on pressure washer fleshing:
https://www.taxidermytrainingunlimited.com/BH-Pressure_Washing.html