Cleaning a old tonearm


Hi, A friend gave me an old Grace 727 tonearm and it is very dusty and dirty from sitting out in the open. My question is how and what should I use to clean it. I do not want to mess with dissasembleing the bearings. The dust seems to stuck to it and will need some type of cleaner. Or is this a lost cuase? Thanks in advance.
motorpsychos
Schipo, just what are these "natural oils" on tonearm parts? A possible lubrication on pivot points I can understand but I am not aware of any natural oil occurring on metal parts themselves.

For anyone concerned with providing a "protective" coating, I would suggest a dedicated automotive or metal polish or wax. Any liquid that does not evaporate away completely, like WD-40, will leave a residue that may attract dust and dirt.
Thank all of you for your help. I used q-tips diped in carb and choke cleaner made by thr Gumout corp. Also I found that pipe cleaners worked very good in tight areas. Looks like brand new almost. Bearings feel smooth with no play. Again thank you all. The other film on it besides the dust I think was nicotine as the guy I got it from is a heavy smoker. It came right off too.
Pryso:are you saying that after cleaning a metal tonearm using an astringent that it might not cause pitting or even "possible show signs of rust? Any lubricant no matter the viscocity will attract dust.
The tone arms I am familiar with are painted, anodized, chrome, or stainless, or some combination of these finishes. I have seen older arms with some form of crud or tarnish but I have never seen one with possible signs of rust. Perhaps I just don't get around enough.

To me, lubricants are for protection of bearing surfaces. For the application of protecting tonearm finishes, other solutions will serve better. YMMV.
I just used a pipecleaner to clean my vpi arm. slow, gentle wipes and the dirt came off incrediible easy. Just a gentle 'blow'....