Today I made my first attempt at metal casting. I was attempting to cast some scales for a straight razor out of pewter. Sounds pretty simple right? I made a mold out of plaster of paris and melted an old pewter statue I found in an old skillet with good pour spouts on my forge. Everything was going ok until i poured the molten pewter into the mold and it exploded everywhere. Luckily I walked away from the incident unscathed exept for my feelings. I let the plaster dry for 24 hrs, am I supposed to bake it? Also the pewter produced a lot of slag, can I fix that by coating the metal in borax? I did consult the magic search bar at the top of the screen before posting but turned up nothing so far. I appreciate your help fellas. Thanks