How should pan coating be evaluated when buying an automatic cooking machine?

Ask what the coating is actually made of, its film thickness, maximum pan temperature and approved cleaning chemicals; vague claims like “premium coating” tell you nothing about service life. Get wear and release data from a continuous high-heat stir-fry run, and check whether the surface blisters or sheds powder after washing. On delivery, cook sticky dishes such as fried rice back-to-back, log pan residue and wok temperature against the manual’s limits, then fold the wear interval into your maintenance schedule and replace the wok once scratches alter the tossing trajectory or the film lifts.