Painters tape, gluestick, hairspray, scrapers, release agent, cut fingers and breakages. None of this is required if you have a Robox ThermoSurface. PEI is a high temperature resin which does not expand or contract in the temperature range used for 3D printing. The bed heats this surface, the model is printed on it and then the bed cools. As the model cools it shrinks slightly while the ThermoSurface remains the same size. The model just slides off, no effort, no residue and no preparation. If needed the surface can be removed and flexed hundreds of times before it degrades. Ideal for almost any material.