Shellac and plaster based sanding sealer to start with and then either:
- hand rubbed tung oil, takes a couple of months but gives a nice silky semi satin finish.
2 short oil varnish, cut back, buffed and polished with carnuba. Semi gloss
- half a dozen coats of varnish/tung mix (aka danish), cut back, buffed and then polished out with a good quality high gloss car polish.
Will probably go for the latter on this one to make the most of the ripple. Last one i did using method 2, *(shown below), will see how it looks with a higher gloss this time.