Specifically, I'm looking for a plastic to cut for stencils that will leave a polished edge and isn't as prone to melting or leaving an ugly smoked edge that cannot be cleaned with water or alcohol. I've been reading up a little on a plastic called mylar. Which I presume is the trademarked name and the plastic is something else. This isn't so easily or cheaply accessible to me in Australia or through my plastic suppliers. However I can get PETG or PVC film. Are either of these products similar? Or even the same plastic running under a different name. Or will these still give me the results I'm after.
Also, when I say I'm after something that wont leave a melted edge, I'm not cutting anything like 2mm squares or anything ridiculous, just regular signage stencils.
Any help at all would be brilliant!