RE: sheeting foam wing ?
There are a bunch of reasons that almost everyone who continues to sheet foam wings eventually migrates to vacuum bagging. And there are two reasons they don't change after that.
It's really worth the effort to find yourself a bag. That's about the only hard part, and it's a lot easier than all the effort and difficulty to gather up weights and junk. And the vacuum bag puts tons of pressure on the sheeting uniformly. The weights don't, and they slide off, and you've got to have a strong level area for the stack (floors ain't always level) and etc etc etc
Plastic drop cloths often come in adequate thickness, and are cheap.