Home Depot sells a kit called a Preval Sprayer, basically a spray can with a bottle on the bottom. I use these a lot to spray colors not available in a can. You mix the paint and some solvent (ratio varies based on the paint type). I've successfully sprayed both solvent and water based paints (Collector Color, and the Tru-Color line for example as well as Scalecoat). The sprayer, if cleaned out after use, will get me several sessions of painting. The kit costs about $5, and you can get a replacement aerosol top for $4. They are usually tucked away on a shelf near the spray cans.
Sprays very nice.
Jim
