What is the best type of aluminum strip for exterior trim?

The best type of aluminum strip for exterior trim is typically one made from high-quality aluminum alloy, such as 6063-T5 or 6061-T6. These alloys offer excellent strength, durability, and resistance to corrosion. They are also lightweight and can withstand various weather conditions without rusting or fading. Additionally, these aluminum strips often come with a protective coating or anodized finish, which enhances their resistance to UV rays, scratches, and other environmental factors. It's important to choose a strip that has been specifically designed for exterior use to ensure long-lasting performance.