your best bet is to use a sprayer
2 months ago
I always use a high quality sash brush, like Wooster, or Purdy. They are more expensive then some others, but it is worth it and the brush will last. The sash brush is tapered and allows you to control the flow of the paint. Here is a picture of the bead board in my kitchen. It is similar to yours except it's 5 1/2 feet tall.

7 weeks ago