styrene cement won't touch the stuff . I need to build the sills down a bit . I have no idea what it's made of and I'm not sure what the shell is made of . Is super glue the only thing that will work? I never ran across this before. It's ether Delrin or maybe nylon. Haven't been able to locate an Athearn bb SW7 shell . It's like the old Athearn side frames. I'm not sure what the shell is made of , I haven't tried the styrene cement on it yet.