Help! How do you do the acid-eaten clothing effect used by places like Lip Service Clothing?

I accidentally tossed my favorite, and only, pair of solid white pants into the wash with colored clothes, and now there's a stubborn blue streak/splotch down one leg and on the hip. I've bleached it numerous times, but it hasn't budged, so I fear I may have to dye them- But before I take such extreme measures and have to kiss my white!pants good bye, I thought I might just... destroy the blue and create a nifty effect as well. So, does anybody know how to do the acidy-holes effect (Even if it doesn't actually use acid) used by places like Tripp and Lip Service on 'post disaster' styled clothes? a link for reference, not my flikr. http://www.flickr.com/photos/84816093@N00/2914162433/ Any help would be much appreciated!

Part of it is simply a screen-printed image (the shiny black parts). Other than that it simply looks like they snipped a few holes with scissors or a utility knife. In the example you've shown, there's a second layer of fabric (possibly a separate shirt) underneath. You can cut holes in your pants as well. I find it's easiest to do with a sharp utility knife (try a large-size box-cutter). I'd put a scrap of wood like a chunk of 2x4 inside the leg and use it as a cutting board. For acid-effects, try to cut out irregular-rounded shapes rather than slashes or sharp angles. You can also poke small holes with an awl to show smaller-damage. Rough up the cuts afterwords with a wire brush, sandpaper, or just pick at the fibers with your fingernails. You can also try some dye, paint, straight bleach, etc to help you jazz up the design. You might try to create concentric rings around your "acid-eaten" holes with paints or you could dye the garment a dark color and then splash and spray it with bleach in select areas.
Okay, thank you so much! I wasn't certain if they could just be cut in or not. Now at least I have an idea of something I can do- Six bleach loads and a rit-dye remover later, and it finally faded...some. I may still do the effect anyways though, because I'd always wanted to try it out regardless. Thank you, again!
If the cut areas rip easily (depends on the fabric), you can do one of two things to slow it down. Sew all around the outside of the holes (ideally with a fabric backer), or apply a glue to stiffen and strengthen the fabric around the holes. Experiment to see which method works best with the fabric you've got!
The material in question is some bizarre sort of cotton-nylon-esque... THING. It claims to be 100% cotton, so it probably is just some special weave of it. It doesn't seem like it rips easily, though- It hasn't got much give, and is sturdy. When I have time to try it out, I'll post an instructable on it if I like the effect. <3 (Will probably be smart and try it out on something other than my favorite pants first- They may be vaugely bluish, but they're still intact for now!)