Hey, i myself did not do it, a friend did on his 300zx. the front and rear are bonded in the same way, with a sort of glue.
he preheated the oven to medium heat, or around 180 degrees, but i am not sure how long he left it. probably just took it out after a few mins to see if it was ready sort of like baking a cake lol
He did it because he was planning on spray painting a part of the headlight silver, which he did, it looks excellent now