My mahogany neck looks great tru oiled, I applied 4 coats, steel wooled in between. I noticed it feeling a little rough, so I looked at it tonight and I have a grey "vintage use" stripe where my thumb slides on the back of the neck. Plus, I didn't grain fill the neck and it feels rough, even after sanding with 1200. So, I am thinking about redoing the whole neck. Should I sand it all the way down, grain fill, sand smooth, then apply more than 4 coats of tru oil? I love the color with the natural mahogany/tru oil. Can I poly over the tru oil? Suggestions please. :dontknow: