There is a tutorial here
http://www.picturetrail.com/sfx/album/view/16314697

Jack Rowe's videos
Part 1
http://www.youtube.com/watch?v=PZBtS_WlcG4
Part 2
https://www.youtube.com/watch?v=TnRgaiU5GEs

Andrew Macfarlene bending a Perazzi
https://www.youtube.com/watch?v=ChWbjer5KXE

I would strongly urge anyone to practice on a couple of throw-away stocks before tackling the stock that matters.