Can plaster stick to door frames?

Yes, plaster can stick to door frames, but the effectiveness depends on the surface preparation and the type of plaster used. It's essential to ensure that the door frame is clean, free of dust, and ideally slightly roughened to promote adhesion. If the frame is made of a non-porous material, such as metal or smooth wood, using a bonding agent may improve adherence. Additionally, applying plaster carefully and in thin layers can help achieve a better bond.