I love my Matt gun- wouldn't be without it. Not only do I use it for
abstract shapes which I can cut and join and reshape, but I also use
it for the base shapes for all sorts of things, often working
directly on the paper where I've printed out the design. Once I have
the base shape in the Matt wax, I can work over it in other waxes,
refining and adding details. The Matt wax is so durable that the
model keeps its shape during the subsequent work. I also use it for
wax wires and prongs, since it's so much stronger than any of the
wax wires out there.
My only criticism of it is that there's not an even finer tip for
it, for really small wax extrusion. I have an old Vigor trigger
press wax extruder which is much finer, but it clogs easily and I've
gotten some pretty severe burns from it. I recently bought a set of
batik wax pens which have a small reservoir and heat over an alcohol
lamp. They work pretty well with Sierra Red wax.