Ray Dunakin said:
How do you keep the epoxy from sticking to the styrene strips?
Certain types of plastic, like LGB ties and butter dishes have a greasy enough surface that it is very difficult to get epoxy style glues to stick. If you had a broken LGB or similar railroad tie and you wanted to keep it together, I'd put a small self tapping screw into each half of the broken tie and then on the underneath side fill the area around both ties with epoxy. It would be a strong fix.
We use the same stir sticks and mixing dishes over many times by just waiting until the epoxy kicks and then breaking out or off the hardened epoxy. If you want it to come out faster, spray a little “Pam” or “Pledge” into the mixing dish before mixing the epoxy. We spray it in, then wipe it out, so it is just on the surface and doesn’t mix in with the epoxy resin and hardener. You could also wax the inside of the container, or any surface you don’t want it to stick to, with mold release wax or car wax.