DIY Tip of the Day: Custom Brush for Tight Spots. Using a hacksaw, cut off half the handle at about a 45-degree angle. Glue a length of wooden dowel to the cut end with epoxy. Wrap electrical tape around the joint to hold it while the glue cures. I made a whole bunch of different sizes for a roll-top desk I was finishing, and they worked better than any gadgets I’ve seen at the paint store.