I picked up some core plast at a sign shop and have used Duco, carpenter glue, epoxy and slow C A on it and they all worked.
When I got the c/plast I asked the guy there what kind of glue to use and was told that all these work, HOWEVER your mileage may vary, so check first, and please don't shoot the messenger...
I have seen some that seemed to be slick also and these glues might not work...