I’m doing a remodeling project on my house and I want to texture my interior walls. I bought a big bag of Plaster of Paris mix and tried using that. No dice. When it’s the right texture to slap on walls, it hardens in under 2 minutes, which isn’t enough time to work it. I tried reconstituting it with more water which didn’t work either. It gets hard lumps in it which doesn’t work at all. before i go back to the hardware store and throw more money away, I have several questions.
Is there anything I can add to the Plaster of Paris that will make it harden slower and thus stay workable longer? Dish detergent? Bat guano? The tears of a virgin?
Does anyone know the relative drying times of different plasters: spackling paste, joint compound, stucco? I want something that will stay workable for a few minutes in a trough pan but dry on the wall within a reasonable amount of time.