This is a very good place to start:
I do way more disassembly of the guitar than Rich does in this, but this is basically what I do. For example I would pull the pickguard on the guitar.
On an old guitar, I would actually use a very mild abrasive. What I use is the swirl remover from Stew Mac. I use this with the microfiber waxing cloths you can buy at an auto parts store. There are similar professional products that are used by people who detail cars. 3M makes a great one called Perfect-It.
Once you use that, do not use any sort of paste wax on the guitar. It will leave a cloudy residue that you won't be able to get rid of. I use a cleaning spray made by Martin for acoustic guitars that does a really nice job and leaves no residue.
For the fretboard, I start with a very stiff plastic brush to clean any gunk off. I got a set of three brushes from the auto part store. The other two have brass and steel bristles and obviously I don't use those, but the plastic bristled one is stiff enough to loosen crud. Also, the bristles are small enough to get down into the grain of the wood.
Next I clean the board with steel wool. I wrap the wool over a fairly flexible pick to get a good edge that will get right up to the frets. Next I brush the board with a toothbrush and then get to work polishing the frets. After the frets I apply the bore oil. Once the bore oil has mostly dried, I go over all the frets with an old washcloth to remove any oil residue and shine them up.