Thanks folks - I am pleased with the colouring so far.
So - the top has had 2 layers of shellac, and about 4 coats (maybe 5) tru oil. Sanded lightly with 400 grit after 2 layers of oil. I am starting to really notice the dips and troughs in the wood (appear to have become more pronounced). Is this because I am not sanding enough, laying oil on too thick, simply the nature of the wood with oil finish, or do I just keep going and hope it will fill up a little more as I hit coat 12+???? Really nervous about sanding the veneer too much. Advice and assurance please!