My best tip is…take your time…

(As most would also agree).

If you have to go back to bare wood, Personally I’ve had best results from the CCL range of refinishing kits - nice that you can get the individual components as well. Be prepared to, if necessary, (as mentioned already) raise and sand back the grain, then ensure the grain is filled before you choose (if necessary) to stain it. This takes time and depends on the wood quality; the better quality being more tightly grained and in need of less prep. Palming in the oil/hardener does take many weeks to build up, but if done with patience will enhance any stock. I’ve also had success with the Napier kit.