Using Latex Extenders

* Add latex extender to latex paint before applying it with a brush. When DIYers brush on latex paint, their brush strokes often remain visible. Pros use an additive that causes latex paint to dry more slowly and smoothly. (This additive isn’t necessary when latex paint is applied with a roller, though there is no harm in using these with a roller when you are painting with both brush and roller.) Recommendation: X-I-M Latex X-tender works well. Expect to pay around $10 per quart. You only use a few ounces of latex extender for each gallon of paint, so a single bottle is sufficient for most household paint projects. Rustoleum.com