Hi Spud.I have several EBMM guitars,as well as many other brands..which I dont use..too lazy to sell em.Maybe a half n half mix of necks..ie maple or rosewood fretboards.I have read countless forums on treating fretboards and am still confused.You mentioned baby oil on rosewood..what about maple..I have teated the backs of the necks only,and now these guitars are 10 yrs old and in need of something.Plz fill me in if you can.Tx,Alf.