OK, this is Chisel here, trying to "chisel" this thread into something else. LOL.
Just have a question about vacuum ( since vacuum is left out by the OP). Say, I want to go the McGyverish way. Can I use my vaccum cleaner to vacuum something like a bag ?? Off course, it won't seal the bag, but with ziplock and some duct tape, just maybe.
What do you think ??
Yes
Look up Vacuum Forming. There are a lot of options for this using a shop-vac.
This is big in the RC and Slot Car hobby for making lexan bodies.
You could also make your own clamshell plastic cases, blisters packs, and such.
Darby