I'm interested in using my CW to make some molds for sand casting. I'd like for them to come out of the machine pretty clean with minimal cleanup work. They would be sealed or painted and will have plenty of draft so they'll easily release from the sand. They would need to be sturdy and durable.
So, what's the best wood or material for mold making? I've used pine, oak, cherry, walnut, and cedar in my CW for regular projects and I've generally had good results with all. I've never carved any pvc or foam. I'm curious what all of you guys consider your "best" material for a painted project.
Here's an mpc of what I'm thinking of trying first, just so you get the idea. Our town's school mascot is a pirate by the way.
car club plaque pirates.mpc