Achei uma loja interessante.. fiz umas compras lá para testar:)
Mas o que me fez ficar curioso é isto aqui..
http://www.air-craft.net/acatalog/Mask-Cutter-2.html
Mask Cutter ( Harder & Steenbeck )

Alguem imagina como isto funciona? para que serve?
The Mask Cutter can be used to easily cut shapes, curves & angles in your masking material.
The blade is height adjustable, this feature also allows the user to prevent damage to the underlying surface.
There are also two steel bars in the cutter, which assists in keeping tension on the masking material.