so, not joking when i suggest this (and not sure if anyone has tried it) but has anyone used Testors plastic cement? i know this is model glue, however, its specifically formulated to work with plastics and the way the stuff works is that it eats into the plastic a bit and melts it together basically. i was trying to find (via Google) if it would stand up to gasoline, but couldnt get any search results for it.
