Lay tarps on the ground around the pool. Apply strips of low-tack masking tape to small areas of the pool that do not require paint. Lay heavyweight paper over large areas that do not require paint and secure the paper in place with low-tack masking tape.
Put on safety goggles and rubber gloves.
Mix 1 cup of chlorine bleach, 1/2-cup laundry detergent and 1 gallon of warm water in a bucket.
Submerge a nylon scrub brush in the mixture, and scrub the top rails and pool wall to remove powdery or peeling paint, mold and mildew. Rinse the top rails and pool wall with a garden hose.
Place a 1/4- or 3/8-inch nap roller onto a long-handled roller.
Mix two-part epoxy marine or pool primer made expressly for aluminum in a painter's tray according to the primer manufacturer's instructions.
Dip a paintbrush into the epoxy primer and apply a coat to the top rails, around the bottom of the pool, around obstacles and a 3- to 4-inch strip near the top rail on the pool wall.
Put the roller into the primer, and roll it back and forth. Roll off excess epoxy primer on the lip of the painter's tray.
Place the roller against the side of the pool and roll the primer on in overlapping V-shapes. Add primer to the roller as necessary and continue rolling overlapping V-shapes onto the pool wall. Let the epoxy primer dry for four to six hours.
Wash the paintbrush, roller and painter's tray with water.
Mix enough two-part epoxy marine or pool paint, made for aluminum surfaces, to cover the top rail in a paint bucket according to the paint manufacturer's directions.
Dip the paintbrush into the paint and wipe excess epoxy paint off the paintbrush onto the side of the paint bucket. Apply a coat of paint to the top rail.
Wash the paintbrush and paint bucket.
Mix enough two-part epoxy marine or pool paint to cover the wall in a painter's tray. Dip a paintbrush into the paint and apply a 3- to 4-inch strip of paint on the pool wall near the top rail, around obstacles and near the ground.
Dip the paint roller into the epoxy paint and roll off excess paint on the painter's tray lip. Roll the paint onto the pool wall in an overlapping V-shape pattern. Add epoxy paint to the roller as necessary and continue rolling paint onto the pool wall until paint covers the entire pool wall.