So I'm on a tight budget and I'd like to get myself some, uh, things to reflect light. I was thinking maybe I could just spray paint some cardboard white. I thought I'd cut a circle out for one to put it around my lens and the other could maybe be larger and foldable? ANyone ever done anything like this? Any one have ideas for cheap/free material that would be more durable then cardboard? I've already got a can of paint.

Thanks,