In case it isn't clear, I took to blu-tacking models to a piece of pipe for easy undercoating (well, where possible, doesn't work with tanks) a while back... but with inclement weather of late spray painting opportunities have been few and far between, and the time to leave them outside to air a bit even less so. Thus I came up with the above. A plant pot thing full of sand. Several lengths of pipe. Do in a big batch then leave on the windowledge to air. Hope no comic book (beano/dandy, not marvel/dc) characters pop by and steal them.