A cardboard box is what I use, either that or just a paper towel on the workbench - open the window when neededQuick question. Those of you that use airbrushes to do your painting, I assume you have some kind of spray booth set up? Did anyone have problems with not being near a window etc for extraction? I've seen one person use a paper towel(???) over the extractor so that particles don't get into the air, but I wasn't keen on the amount of noise it generated.
Photos of your setup would be appreciated