I just came up with something that may be old hat to many of you but not to me. I need to do a lot of cutting of foam board and am going to order a hot wire cutter with extra wire so I can shape some custom cutters. However I wanted to get started and had many straight cuts to make. I took what I call a shoe knife (used by cobblers to trim the leather on the outside of new soles) and my torch. I heated the knife blade about 6 seconds and was able to make a very smooth 4' cut in a 2" thick foam board like cutting soft butter. I also found out you can do some sculpturing with it.
A lots less expensive than a hot wire cutter!
Jim
