The purpose of vacuum bagging is to increase the ratio of fiber to
polymer. As far as voids go, the best possible layup is still by hand
-assuming the men doing it can be bothered to wet out and roll it out
well enough (and that is usually a big problem in FRP!). Vacuum bagging
does not prevent voids -in some cases it can make them much worse.

Cheers MC

DSK wrote:


Now, if you were talking about resin-infused molding, then perhaps it's OK to "lay it up just
the same" as FG. The guys who are doing quite good work in CF say you should at least vacuum bag
it to get any of the benefits of using CF in the first place.