Cheers for all the advice. The tung oil I have been using hasn't hardened (if that's the correct term) - if I handle the body, I end up with oily hands. This is about 10 days after applying it and wiping it off etc. Hopefully it will soak in or the excess rub off. The sample I tried was fine but the actual body, looks pretty good but is just oily to the touch.
What I'm finding is building basses is fine in terms of wood work, but getting that quality finish is proving a bit more tricky!!