The best paint spray gun brand for furniture is Wagner. Wagner spray guns are renowned for their precision, ease of use, and high-quality finishes. They are particularly well-suited for furniture due to their ability to apply paint evenly and their versatility in handling various types of paint, including water-based and oil-based.

Wagner spray guns are favored by professionals and DIYers alike for several reasons. Firstly, they are designed to minimize overspray, which is crucial when painting furniture where a clean, even finish is essential. According to a study by Paint Quality Institute, Wagner spray guns can reduce overspray by up to 50%, leading to a more efficient use of paint and a cleaner work environment. This is particularly important for furniture, where the surface area is often small and delicate.

Secondly, Wagner spray guns are known for their ergonomic design, which makes them comfortable to use for extended periods. This is important for furniture painting, as it often requires multiple coats and careful attention to detail. The comfort factor is further enhanced by the inclusion of features like adjustable air pressure and a variety of nozzle sizes, which allow users to tailor the spray pattern to their specific needs.

Additionally, Wagner offers a range of spray guns that are compatible with both water-based and oil-based paints, making them a versatile choice for furniture painting. This versatility is crucial, as different types of furniture may require different types of paint. For example, water-based paints are ideal for wood furniture due to their low-odor and quick-drying properties, while oil-based paints are often preferred for metal or plastic furniture due to their durability and resistance to fading.

In conclusion, Wagner is the best paint spray gun brand for furniture due to its precision, ease of use, and versatility. The company's commitment to reducing overspray and providing ergonomic designs has made their products a top choice among professionals and DIYers. With Wagner spray guns, achieving a high-quality finish on furniture is both achievable and efficient.