The full finish is on a maple necks with maple fretboard only, the lemon oil etc is for rosewood fretboards these you dont finish but i know some who have.
I know some people who keep their maple boards without any finish, but they end up looking very dirty and very sad very quickly.
I just disposed of (correctly) all my Tru Oil large and small bottle, it was getting on in age so i wont bother trying to use it, i am going for a wipe on poly this time, then i might see how the Dingo Beta stuff goes on a project i am about to start after he releases it.
I could just go and arc up my mates guitar spray booth, but i have a thing for hand finished guitars these days.
So on my tele kit (arrives tomorrow) which has all maple neck/fb, would it be okay to do Tru Oil on neck and fretboard? What about staining/dyeing the fretboard?