I use acrylic craft paint to brush paint these plastic people, remember Paul's comment to pre-wash these plastic people in soapy water before painting, A good source for these craft paints is your local Hobby Lobby, check their web site and search for craft paints, the stores carry the Anita's, Americana,Folk Art and Delta Ceramcoat in many colors at reasonable prices. I have used all these brands with not issue, some are permanent, after painting and when dry, I brusk apply a clear acrylic sealer. If the stored paints lose the viscous flow add some distilled water to the paint bottle and vigorously shake the bottle to blend the water and paint pigments. Hobby Lobby also sells brushes for acrylic painting at reasonable prices. I have see some modelers of plastic car kits air brush thinned acrylic craft paints, this can be see by searching the web for air brushing thinned craft paints.