bleach design

[twinklebella.livejournal.com]

One of my friends LOVES the musical wicked...I want to make a stencil of the Wicked musical poster and bleach it out on the back of a hoodie...he's a straight guy and i figure that way it would still be kind of "masculine" for him, but his favorite show and home-made and all that good stuff. Has anyone ever done large bleach designs like this before?

I was thinking about putting the bleach into a squirt bottle and spraying it on for a spray effect....for anyone who has done this before, or even if you can just help me out, my biggest questions are:

1. what should I use to make the stencil out of so that I don't get runny lines from the bleach being too absorbed into the fabric on the stencils' edges? is this something I have to worry about a whole lot?

2. how long do you think I should leave the bleach sit on the fabric before I wash it out?

thank you so much!