To steal a line from George Costanza. After a brief hiatus from casting due to the ridiculously hot weather, I got back to work and cast some scale tires. They came out pretty nice:
The only trouble I had is the shrinkage I experienced on some of these castings:
Is this a completely normal phenomenon? And is there anything I can do to either keep it from happening again or to keep it to as little shrinkage as possible?