|On most touch-ups you can use a black or brown
china marker. They can be sharpened to a very fine point and are
considerably easier to use than a brush. A thin fine brush does not hold
much color. You are constantly dipping back into the color for a refill.
Keeping grain lines straight and to an even thickness with a brush
requires a steady hand, patience and a lot of practice. I'm not as good at
brush grinning as I used to be, feeble hands and declining eye sight have
taking there toll. However, getting the color right is 90% of the job.
Natural wood grain is very erratic and irregular, so if your lines are a
little shaky but the color is right , it will be a good job.