well..I'll assume we're talking about ebony or rosewood..not maple. After using pure lemon oil for many years..it has become almost impossible to find without petroleum distillates in it. I have since found and have been using bore oil by
Fret Doctor. Bore oil is used and recommended by some of the top guitar builders like Scott Lentz. It's great stuff..better then the lemon oil which did not penetrate like this stuff does.
I oil my boards about once a year if that...I live in a humid climate so it's not necessary more often. If you live in a dry climate you may want to oil a couple times a year at most.
that's my 2 cents
