(This doesn't really have to do with goaltending, but with hockey in general... stuff I ALWAYS wanted to know)

Anyone know how they do those beneath the ice crease/lines/logos/etc? What puzzles me is when lacrosse season comes, and they melt the ice, the floor is cement color... do they put a big white sheet over the ice and then flood it? Are the logos on seperate sheets or is it just one big under ice sheet?

How does the Zamboni work? Does it actually "shave" the ice, or merely pour water over it... is that water hot, it seems to steam...?