If you’re helpless to know the difference, then check out [Eric Strebel]’s 9-minute masterclass teaser video on making a two-part mold for resin casting ... tip is for DIY mold release ...

Rapid prototyping uses three-dimensional (3D) computer aided design to quickly fabricate a part or, alternatively, a sand mold for casting a part from metal. Currently there are many limitations with ...

Fair warning: if you’re going to try to mold uranium glass ... we recently saw a DIY metal-melting microwave forge that would probably do the trick. The actual casting process is pretty simple ...