Here's some threads with various bedliner applications, including some masking pics.

http://www.vehicross.info/forums/sho...ht=monstaliner

http://www.vehicross.info/forums/sho...gatorback+dope

http://www.vehicross.info/forums/sho...ht=monstaliner

http://www.vehicross.info/forums/sho...ht=monstaliner

http://www.vehicross.info/forums/sho...ht=monstaliner