I believe I read some while back about using plaster of paris to replace the old putty. However, I cannot find the thread. I believe Peter Nunes made that suggestion. I think he mentioned using acrylic paint to dye the plaster of paris. My question is how and what proportion of paint to plaster of paris to water do I use (approximate is good) ? How long will it take to harden with this approach ? I think it sounds like a great idea, and want to try. Thanks.