I tried plastering our chimney today with mixed results. I'm quite satisfied with the outcome and the plaster seems to be holding, but I made a significant misjudgment regarding how much mortar is needed. I quickly realized that I had far too little, and now I'm wondering if I need to knock down what I've already applied or if I can just continue? What about the slurry that I've already thrown on, is it okay to let it dry and then plaster as usual on top of it? I thought (hopefully not!!!) that you have to do it "wet-on-wet" so to speak.
