If you want to go with Odie's, you'll want to get down to bare wood, but other than that I don't see any problems. No need to do the bottom.
The nice thing about finishes like Odie's and Osmo is that maintenance is a breeze. With either one you can refresh the finish with minimal prep.
Half of what we read or hear about finishing is right. We just don’t know which half! — Bob Flexner