+1 what Mmuppet said. Likely you will be much better off just wiping down, oiling the machine surfaces and explore how it runs, and makes parts. The machine will tell you if any thing needs repair. Big mistake to tear it down the sake of tearing it down. An old time master machinist once asked me if i disassembled and rebuilt my first car - just so I could learn how to drive? Same thing with machine tools. These are very specialized and sophisticated instruments. The people who designed them are far more knowageable that most of us will ever be. Better off to leave it in one piece, learn how to operate it, first...
PS. Whatever you do, DO NOT take the headstock off the bed. Not even to clean or paint. The factory torqued the headstock to the bed with very precise settings - to ensure .0001 or less alignment. If you loosen the bolts, you will loose any pretense of alignment between ways, spindle and headstock. Very, very difficult to put it back together again, unless all you are looking for is a pretty paint Job, and nice front office display.
One other tip. I’ve actually got a 1929 SB 9. The finish on my machine is not paint, rather, it is Gilsonite- trade name for Asphaltum. A mineral substance everyone used for autoundercoating and machine tool coatings back in the ‘20s. Gilsonite was a mixture of lamp back (carbon), linseed oil and asphaltum, melted and mixed, then baked on in layers. Pretty cool stuff. Impervious to water penetration as the crystalline structure interlocked on the surface and sealed against outside humidity. So if you see a black sort of basecoat, that’s probably what you are looking at. You can actually buy this stuff in small quantities from the mine in the Western US, where it is still produced.
Good luck.
Tlenn