Any good exterior 100% acrylic paint will work great for aluminum siding. Choose a good name brand available at a paint store in your area.

The key to a lasting paint job is the preparation. Washing the siding with an environmentally friendly soap and rinsing well to remove any dirt, grime, and loose paint. If there is any peeling or chipping paint, it must be removed completely to ensure a smooth finish.

I also recommend priming with a 100% acrylic primer for the best bond. This will ensure better adhesion and longevity of the paint job. Apply the paint in thin, even coats using a high-quality brush, roller or airless sprayer for a smooth finish.