For wood I use a base coat of Tamiya Flesh, followed by a coat of Future.
I leave that to harden for a day or so, then apply a dilute coat of burnt umber oil paint.
I let this set for a few minutes then drag the brush over it to create a grain effect.
You can repat with other oils colours, eith direct over the first coat, or after a further coat of Future.
Not sure how this would look in 1/350 scale though.
Karl