DIY - Staining
How to Stain Wood Evenly Without Getting Blotches and Dark Spots. Get a perfect finish on even hard-to-stain woods like cherry and pine. Woods like cherry, pine and birch [and fir] can become blotchy and unattractive when stained, unless you use a sealer before staining. For the best results, test the possible finishes on scrap pieces before you start.