O Road posted:Testors styrene glue is ineffective (so it's probably not styrene or ABS) and super glue is also not particularly effective. istance.
Styrene glues are not effective on ABS; CA is not very good for ABS either. So, it actually might be ABS.
Only thing I know that works well on ABS is a solvent glue that has a high percentage of MEK in it or an ABS specific solvent glue such as that sold by Plastruct.