Well the notion that both ebony or rosewood have enough oil in them to just buff and that's it- I've heard that and done that. In my experience an oil type finish on those woods isn't that great. I also do the superglue finish which will work with both woods. It isn't pc.
Here's how: put some superglue on the wood and QUICKLY spred around with a piece of plastic- an old credit card works well. The superglue will dry in about 20 seconds but it needs more time to cure. I wait about 20 minutes. The first few coats will be uneven. You can put on about 2 or 3 coats and then start sanding. The sanding evens out the finish. Maybe 320, 400, 600 grits and then the next coat, then sand 320, 400, 600, and another coat. When the coats are even and you are happy, 320, 400, 600 AND then 1,000 and 1,500 grit and buff. You can buff to a high gloss but a satin finish looks better IMHO.
Or, you can just buff the bare wood, or put on one coat of wax- like Wick said. That's most likely the PC finish anyway. Some of the extant trade/scalpers from the 1840 or earlier era are still around and the wood looks pretty good. Rosewood is a pc choice. Ebony is as well although less common.