I have this oldish Warwick streamer mostly maple with the exception of a few laminates .
The bass is finished with a clear varnish that I'm contemplating on removing , and just having an oiled finish / perhaps even a colored oil refin.
The bass looks kind of 'dull' at the moment (the pic doesn't really show the dullness due to the flash / in fact the bass looks ok in the pic).

Any suggestions would be helpful / even if it's to say that I'm out of my mind :D ....

The maple will turn dull and brown fairly quickly if you don't put a hard finish on it... maple is like a dirt MAGNET. lol

That having been said, if you wax it, it shoudl be OK

perhaps a good buffing would give it some 'life' ....

If that were my bass, I'd agree with Bassed. Head over to your local AutoZone and pick up a bottle of polishing compound and a microfiber cloth and give it a good buffing.

yeah, give it a good buff first. if you still don't like it you can think about refinning it. but you must realise that Oil will only give a gloss finish if you apply plenty of coats and buff and wet-sand it well. but it should keep the maple clean. I do maple neck with a few coats of shellac sealer and then some Tru-oil, it darkens the maple slightly but after than it stays clean.