Want a finer, more-even coat of paint when you spray? When using a can of off-the-shelf aerosol paint, here's how to improve your spritz. For a finer, more even coat of paint, set the can in warm water before using. Cans of spray paint often sit in cool places like the basement or out in the garage. By raising the temperature a bit, you make the paint flow out of the nozzle more easily and evenly -- with less globs and blobs. And the added warmth causes the propellant to expand just a little bit, too, increasing the pressure and boosting spray power. Use warm water, not hot or boiling, and just for a few minutes. And that's the On The House Tip for today.