I’ve cut down cardboard boxes into paint shields (no fan) and painted with rattle cans in the garage with the door open while wearing a respirator to keep overspray from messing up the paint booth. The solvent vapors dissipate quickly is there’s a light breeze, so my wife doesn’t notice I’ve been painting unless I close the garage door too soon. Most rattle can model paints dry quickly. About the only rattle cans I use are Tamiya Fine Light Gray Primer or an occasional can of Krylon flat aluminum.

Nelson Moyer