Cordless Sprayer. The new ProShot one-quart sprayer — made by Graco for Sherwin-Williams — is powered by an 18-volt lithium-ion battery for easy portability. It comes with two common sizes of reversible spray tips; other sizes are available. The $450 unit should last through 50 gallons of spraying, and after a pump repacking, it should last for another 50 gallons. Sherwin-Williams, 800/524-5979, sherwin-williams.com.