Spray paints and primers easily add color and coatings to indoor and outdoor surfaces for decorative and protective purposes. These products are easier to apply than brush-on paints and cover areas faster with less paint. Spray paints come in varying sheens and in metallic spray options that are designed to stand the test of time and the elements. They are either general purpose, rust preventive or rust restorative. Spray primers are aerosols that offer thorough surface coverage and faster drying times than brush-on primers. Primers coat surfaces with a protective layer that dries to a smooth finish and resists chipping, cracking, and peeling. Applicator grips attach onto the rim of spray paint cans to control the flow of paint and make large projects easier to cover. Spray cans can be refilled or customized with aerosol-filling machines that also charge the air pressure in the can.