I have just started cutting Corecell foam and polystyrene trial foam for foils with a 0.0012 inch 7-stranded stainless steel wire hotwire system. The resulting kerf is really thin.
Why use a saw?

Dacarls:
A-class USA 196, USA 21, H18, H16
"Nothing that's any good works by itself. You got to make the damn thing work"- Thomas Edison