I've got a 6oz tomato paste can with both ends cut out; I want to use it for a hammer mold. If I cut it in half lengthwise, I don't think I'll be able to keep the halves lined up when I pour. So I think I'll just cut it along the seam and leave the other side uncut. That means I'll have to destroy the mold to get the hammer out
I'll use a 60d nail for the handle (with a hole drilled thru to lock in in), seal the bottom with heavyduty aluminum foil and a hose clamp, and another hose clamp around the top. Then seal everything up with stove cement.
Sound OK?