Basically all a dehydrator does is pull warm dry air across whatever is inside it, dry out apple and banana slices, or cure the paint on your model faster.

I do the same thing with my spray booth, just leave the fan running for an hr or so when I am done spraying, the fan draws air from inside the booth, across the freshly painted kit, the air will help dry/cure the paint. No it isn't heated or purely dry, but it works.

The Dry Booth doesn't dehydrate the air, just heats it up slightly, which in theory does dry it out some, pulls the air across whatever is in it, and drys it out. Alot of money for something that can be found pretty much anywhere. And if you already have a paint booth...just leave your fan on for an hr when you are done painting, and effectively does the same thing.