Since I've been having such good luck using styrene and hot glue to fill my gaps, I was wondering if anyone just makes a liquid styrene that does the same thing.
Didn't you ask this question on another forum a while ago?
Styrene is thermo formed. You can use a plastic solvent to dissolve it into a solution but it'll shrink as the solvent evaporates out so it's no good for gap filling. Tube glue is essentially the same thing.
Superglue! Quick, convenient and sands at a similar rate to styrene so you can blend filled areas in seamlessly.