Styrofoam is one of the easiest materials to shape by normal means e.g. slicing with sharp knives or a hot-wire cutter, sawing with serrated blades, rasping with files, and smoothing with sandpaper. The real challenge lies in controlling the shape and especially, in this case, how one achieves concave forms. Here are the methods I’ve employed for a particular model piece which needed a ‘bowl-like’ form and very regular curves. I’ve used the standard blue styrofoam for this, in it’s most available thickness (2.5cm). There are other styrofoams, such as orange/pink or white, which are even finer and slightly denser.Via Eric Hart.
Saturday, April 19, 2014
Model maker David Neat brings us an excellent tutorial on making smooth shapes using foam. His technique uses precise layout and simple sanding forms to produce some surprisingly complex shapes.