The best paint brand for iron doors is Behr Marquee. Behr Marquee is renowned for its exceptional durability and high-quality finish, making it an ideal choice for exterior iron doors. This brand offers a wide range of colors and finishes, ensuring that homeowners can find the perfect match for their style and architectural needs.

Behr Marquee's paint is formulated with advanced technology that provides excellent adhesion and resistance to fading, cracking, and peeling. This is crucial for iron doors, which are exposed to harsh weather conditions and require a paint that can withstand the elements. According to a study by Behr, their Marquee line has a 100% acrylic formula that offers superior protection against UV rays and weathering, ensuring that the paint lasts longer and maintains its vibrant color.

Additionally, Behr Marquee is known for its easy application and clean-up, making it a popular choice among both professional painters and DIY enthusiasts. The paint's low-VOC content also contributes to a healthier indoor environment, which is a significant advantage for homeowners looking to minimize their carbon footprint.

Another factor that makes Behr Marquee the best paint brand for iron doors is its excellent coverage. The paint can cover up to 400 square feet per gallon, which is particularly beneficial for large doors or when touch-ups are needed. This not only saves on material costs but also reduces the time and effort required for painting.

In conclusion, Behr Marquee stands out as the best paint brand for iron doors due to its durability, wide color selection, ease of application, and environmental benefits. Its high-quality formula ensures that iron doors remain protected and aesthetically pleasing for years to come.