Paint removal help

[simplechamp]

I bought a new body for my Jammin GT, and it came pre-painted. Due to the shape of the body I couldn't get the headlight stickers on without them creasing and looking bad (maybe there is a technique to do it right, but I screwed them up already)

My question is, what is the best way to remove the paint from only the headlight sections while leaving the rest untouched? Can I just mask around them and use thinner? Or is there a better way? The front part of the body is solid white (see pic), so I don't have to worry about ruining the design. I can fill it in with a rattle-can if I take a little too much off.

I want to paint some headlightlights on by hand from the inside, or maybe even put in some light buckets and LED's.