We moved into a house recently and the wooden work tops in the kitchen are a mess. I think the previous owner varnished them rather than oiled them, the surface feels almost sticky and tacky and there are yellow splashes on the tiles which indicate it's varnish. So. I want to do this myself. What's the best way? Is it as easy as sanding it all off and then oiling it up? What's the best oil to use? And I assume I need some sort of sanding machine or it'll be a lot of elbow grease...