We went out yesterday and bought a big piece of Alum to make a reflector for our VHOs for our custom hood. This is going to be OK right?? I've seen some saying galvinized steel for MH, but this is just VHOs.
I've always used aluminum foil for compact flourescents - no problems yet. For cooler lights you can also use mylar for slightly better reflectivity but I think it would melt with VHO.