[quote name='radansey' timestamp='1331376762' post='1572012']A bit concerned how to clean the general grubbiness - hopefully it has not become too ingrained. Any advice on how to do a oil/wax finish would be most welcome.[/quote]
At first, it's important to remove any previous finish, so that the wood's grain is open. The surface should be smoothly polished ... Then you can start applying tung oil in very thin layers, using a clean rag or something like that. It takes several coats of oil for a nice, smooth finish. Let each (thin!) coat dry out well, buffing it very lightly with fine polishing wool or similar, before applying the next coat. Polish after applying the final coat, and you should get a nice, even oil finish
There are several tutorials on youtube, just try searching for "tung oil finish" ...
But your Spector doesn't look too bad on the pictures ... Actually, it really looks good - you can see it's been played, of course, but that's what an instrument should look like in my opinion So for me, personally, a good cleanining (for the fretboard, I'd recommend lemon oil - not only good for wood maintenance, but also gets dirt off like nothing else; for the body I'd use just a little bit of really mild, diluted cleaning fluid on a smooth cotton rag, only slightly moist) would probably be sufficient
Really a nice bass, and more than a steal for that money ... I'm trying hard not to hate you for it