Other paint-thinning options include turpentine, acetone and naptha. While most paint thinners are used with oil-based paints, “there are some formulated to be used with latex,” Otto says.

Paint thinners contain hazardous ingredients, like acetone, benzene, methanol, and turpentine, and are highly flammable. Not only is the liquid itself an issue, but your paint thinner's fumes are ...