Glue

I am about to build a Prusa. I have found instructions indicating to glue bushings to parts... What kind of glue do I use?

On ABS parts: use superglue (cyanoacrylate), special ABS glue or epoxy.
For PLA: i only has limited succes with epoxy and the surface needs to be really rough.

What if it is ABS to PLA... I have PLA bushings and ABS parts.

When I built mine, I use epoxy resin, those come in 2 tubes and you need to mix them by hand. It takes about an hour to dry, but once its tried, it stuck solidly.

Glue from model shops also worked well for me. Since model kits are made from ABS, although a bit expensive, but that kind of glue was just perfect. I also managed to stick PLA with it.

I tried heating up the PLA parts with a lighter, when it is softened then press on each other to stick, but no success..