How do you glue these back on?

I hate to kinda take over moparmandans thread, but theres lots of ingenious ways to use these repair products like JB weld, and MEK to fix major parts. I hope my replies help some folks who need to fix this stuff.
Hey Mat you ever try MEK on a taillight lens? Not necessarily a crack but I have a couple chips on the painted silver parts. Like around the back up light lens.