The ES G100 One Quart Cup gelcoat spray gun is widely considered to be the industry standard for spraying small amounts of gel coat at a time. The main assembly of this sprayer is constructed of cast aluminum, with brass and steel workings. Built-in air volume control governs the rate of spray. This paint gun requires a minimum of 5.8 CFM at 80 PSI of compressed air for proper operation.

Included is a heavy-duty, reuseable plastic cup. The ES G100 also accepts disposable one quart paper cups. Jamestown Distributors also carries 32 ounce disposable cups for this sprayer, sold separately.