I saw a guy on the DIY channel the other day finishing a mandolin with nitro. He was using a brush to apply it. By the time he was finished it looked amazing. I never hear of anyone using a brush to apply a finish on a bass. Why is that? I'm sure it takes longer than spraying and their might me more sanding required to level the finish. But, for us guys without spray equipment it seems like it would be a good option. Anyone using a brush on their instruments?