Im of the opinion that wood doesnt need to be babied, and if you hand oil doesnt cut it- then put some kind of other oil on it IMHO
I have this ancient cutlery with rosewood handles, and theyve been through all kinds of hell and back- sitting underwater in sinks in grease and grime, through dishwashers using caustic washing powder, just years and years of crap and once you clean and dry them they look brand new...
I totally agree. I've owned dozens of rosewood board guitars over the years and put all sorts of stuff on them (furnature polish, olive oil, tung oil, lemon oil, linseed oil, gun stock oil, and various products that were supposidly made for guitars). I've never encountered any problems with fretboards. Bottom line is that rosewood is a very durable wood, containing a lot of natural oils. All of the hype of "use this, don't use that, if you use that will make it turn to dust" is mostly hype and opinion. So if you are having good results with a particular product, I say keep using it.