What type of brush is recommended for painting window trim?

The recommended brush for painting window trim is a 1 1/2-inch sash brush. This type of brush is specifically designed for detailed work, making it ideal for painting the trim around windows, which often has intricate profiles and requires precision. The sash brush has a tapered edge that allows for better control and finesse, enabling the painter to get into tight corners and along edges without straying onto adjacent surfaces.

In contrast, the other brushes may not provide the same level of accuracy or may be too large for the delicate work required on window trim. A flat brush, while useful for certain applications, lacks the taper needed for precision. A round brush can be less effective for sharp lines and detail, and a larger angle brush may lead to over-painting and uneven coverage in tighter areas. Therefore, the choice of a 1 1/2-inch sash brush ensures clean lines and a professional finish when working on window trim.