vacuum bagging variation for composite construction

Hi All, it was recommended that I re-post a question I had here. It's a question about methods, so not totally clear where it should go. The original post is here: vacuum bagging variation for composite construction https://engineering.stackexchange.com/questions/17334/vacuum-bagging-variation-for-composite-construction?noredirect=1#comment31618_17334

"has anybody ever tried clamping camping foam to layers of composite materials to act as a bleeder material, as an alternative to the full vacuum bagging method? in this case, you could clamp a sandwich of camping foam and thin plywood.. or if you're applying composites to something long and thin, you could wrap the whole thing in seran-wrap and use -it- as the clamp. the foam will end up sticking to the part.. you just rip it off. if it isn't an external part, no problem.."

thanks!

 

whats the point? why not just use regular breather and a perf'd release film.