Well I learned something new! I did not know contact cement would take high temps. I believe Ritchie said his heat blanket gets too 190deg.
You can use most anything smooth and flat to cover your form. Formica/laminates work real good. Sheetmetal, roofing trim, aluminum, etc. I have used whatever I can scrounge for free. Thin slats of wood are good also, just countersink the screw heads and fill with bondo.