I saw something like that once, except that it involved ABS plastic shavings and acetone. He used it to make a custom car stereo mount in the dash. He called it "ABS Glue".
Found it HERE (Second post down)
made napalm like that once. then i almost killed my brother. I never thought about letting it set into a plastic though. we used to use the napalm version and blow my grandpas oxygen into it so it burned under water! it was cool. oh those were the good ol days.