How to preserve plaster of paris and avoid it breaking away?
I'm making the Good Samaritan gun from Hellboy per the instructions on Indy Mogul. One of the parts of the gun, the barrel, (erm....where the bullets go), is made from plaster of paris. From experience, I've learned that this can break on its own eventually. Is there any way to avoid it weakening or breaking? Perhaps covering it with something?