I need to make some new patterns. I am planning on cutting them on a cnc mill. In the past I have made wood patterns and had a pattern maker cast them in plastic for long life. I'm thinking I can skip that step if I machine them from plastic. I've looked at tooling plates from freeman supply. Then I came across some videos showing a guy cutting urethane casting resin. Looked slick. I don't know what type of resin it is. freeman has so many varieties. Anyone have a recommendation? Thanks.
[nomedia="http://www.youtube.com/watch?v=xlz2Brf_Sgk"]YouTube - ‪Homemade CNC Router 2009‬‏[/nomedia]