How do I apply a finish to as well as paint plaster? Answered
I made a large sculpture out of styrofoam, which was then covered in some kind of plaster. I would like to paint it. I'm not sure exactly what kind of plaster it is, but it's white, and powdery, and you could chip off little dried pieces that can be crunched up into powder, but it's not weak, like it's on a pretty tall, thin sculpture and it hasn't cracked or anything after transport and sitting in a garage for months. I think I would have to apply some sort of sealant, or finish in order to paint it properly, but I have no idea!
Also if you are going to reference some sort of resin that I should use please tell me common brands or whatever so it would be easy for me to find at say, home depot or wherever