Concrete benches, similar to concrete flooring, are durable and made to withstand the elements. Unfortunately, they can also look drab and boring. A bright coat of paint can do wonders to transform any concrete item.
Patch any cracks in the concrete bench using a solution of cement and water. Mix until a thick paste forms. Apply to cracks and allow to cure for 5 days.
Clean the concrete bench completely using a degreasing cleaner. Remove all film and dirt from the bench. Any residue will interfere with the primer's ability to bond with the surface.
Create a rough texture on the bench that matches 180-grit sand paper so that the primer will adhere. (Anything smoother, including previously painted surfaces, must be textured.) Create texture by rubbing the surface of the bench with a wire brush to create grooves.
Apply epoxy primer to the surface of the concrete bench. Use thin, even brush or roller strokes. Cover all areas completely. If you can see the original color of the bench through the primer, apply an additional coat.
Brush oil based paint into the crevices and difficult-to-reach places on the concrete bench. Use a roller to apply paint to the rest of the concrete bench. Two thin coats are preferable to one thick coat.
Apply a polyurethane topcoat using a brush or roller. Topcoat comes in glossy or matte finishes. Either type will similarly protect the cement bench. Choose the finish you prefer.