I aqcuired today the bench pictured in the attachment. It is made of driftwood and comes from Malaysia (I think, it might be Philippines instead). It has a lot of curves and crevices, and the inside of some is rough. It also has a few cracks, thankfully in places that do not compromise its structural intergrity. It has has been stored for a while and as a result it has some muck (will clean after I brush and hoover it). I plan to (very lightly and carefully) smoothen up some of the surfaces inside some of the crevices with a dremel so the splinters and loose parts that exist will go and the said areas will look better. Thought it is prudent I clear it up properly and then treat it with some sort of oil or varnish. the question is which product should I use? Any help and advice is most welcome. Thank you in advance!