Look you are not trying to duplicate the "Mona Lesa" just some false grain streaks. Visit an Artists supply store purchase some Ivory Black, Burnt Umber, Vandyke Brown, Oil or Acrylic paints while you are there purchase some light brown card to practice on, may be a couple of different sizes of squirrel hair or equivalent brushes and most important of all obtain some feathers to use as a brushes, they give that fade out effect far easier than you can get with a brush. Then comes the hard part practice your technique it wont take too long to come up with a passible result. Remember you seal the wood first so your paint does not soak into the wood instantly, and if you dont like what you have done just wipe your efforts off with a solvent and start again.
