I've been trying to make this shirt for a while.
Click link for a closer look http://fc02.deviantart.net/fs71/i/2011/041/0/f/rubi_malone_shirt_by_biothief-d302yh7.jpg
I made several attempts but the lines were never this clean. What I did was that I made several (layer) stencils from contact paper (bought in a hardware store; the kitchen section). I'm amazed at some of the details, both thin and small (the monkey on the pistol handle measured only 3/4 of an inch), one can cut out (with an Xacto knife, of course). I cut out each layer while the first film of paint dried.
On the inside of the shirt, I placed lines of duct tape because, in my previous attempts, the paint brush would pull some of the shirt thru the stencil and the paint would bleed to the side. This will allow the fabric to be somewhat stiff and protect the rest of the shirt. I find that less paint bleeds thru the shirt using this method.
I also figured my problem was how I painted; instead of brushing side to side, I kindof did little up and down jabs (perpendicular to the shirt surface).
The paint required 2 coats; it'll crack in places which is what u want. After the paint dried, I placed a sheet of paper (the contact paper backing that it sticks to) ontop of the shirt and ironed it for at least a min.; when curing paint (so it doesn't wash out), always place a wax sheet btw the shirt and iron so it doesn't burn the paint.
Lol, I also can't seem to get this monkey off my back (joke)!