I have experimented just a little recently. I have an electric vacuum pump and have used an acrylic canister and a glass canister as the chamber. Acrylic worked fine but the fumes from the Minwax Wood Hardener turned the interior white so it is no longer clear. Of course, fumes had no effect on the glass.
I read somewhere (cannot find the site now) about mixing equal parts Minwax Wood Hardener, Boiled Linseed Oil, and Denatured Alcohol. I used that cocktail, pulled a vacuum several times during the day and then let it sit overnight under vacuum. Seemed to work fine. It turned some really delicate, porous spalted maple into some much harder and heavier material. I was able to saw, drill, glue, pin and sand it.
I'm certain at some point I'll spring for a real chamber and some Cactus Juice.