A friend has a very specific symbol she wants around the sides of her cake, and I was thinking it would be easiest to make a stencil. I'm not sure what the best material to use would be, as I don't want it to fall apart. Any advice is greatly appreciated!
overhead transparency film or those clear plastic report covers (the really cheap ones with the slide on clamp) can both be easily cut with an e-xacto knife.
Many craft stores have blank stencil sheets to cut your design from. Cut with a sharp Exacto knife.
You can also buy a stencil burner, it is something like a woodburning burner. I will use both, if I don't get my stencil burned cleanly, I will use the exacto knife to clean it up. The burner is faster than the knife.