I Just did mine last weekend, getting them apart is a big pain in the ass, it takes alot of patience and cut up hands. I did a combination of heating them in the oven and using hair dryer. I had to break alot of plastic around the rims because it was brittle for some reason. I used the oven at its lowest setting do not turn it up to much or your will warp or melt your light housings.

After heating up the lights in the oven i went around each housing with a putty knife getting as much glue out as possible and seperating the lens from the housing (this took about 4 hours) be very carful and TAKE YOUR TIME, this is not going to be a quick process.

Then you just have to mask the reflector with some tape, my tape was a bit to sticky so i put it on a shirt a few times so it got less tacky. If its too sticky it will pull off the reflective paint on the reflector which is not good. Masking is personal preferance and takes a bit of time as well to get it just right.

I put 2 coats of primer and 4 coats of high heat paint on them, you may not need high heat paint, i just happened to have some laying around. Then i used clear sylicone to put them back together and reversead the steps to put the bumper cover and cross member back together.

Have fun, and make sure you have a good 6 - 8 hours if you want to do it right.