What do you guys suggest using to seal/protect oak veneer internal doors? I've used waxes, oils, stains and varnish (and paint) in the past on softwoods but never had to seal a hardwood before - except our worktops where I used 'Osmo Polyx Oil' which I though was brilliant stuff. I liked the sheen it gave, and the hardy protection and didn't leave the wood feeling and looking dry like a lot of oils do after a short amount of time. That hardy sheen is important too with 3 kids running about with their sticky fingers! Would the Osmo Polyx Oil be suitable for internal oak doors or is there something else I could use? Bear in mind the Osmo Polyx Oil isn't cheap and I need to finish both sides of 15 doors.