I have a '55 P-bass. The back of the neck has large areas with no finish. It is player wear, not from sanding. The finish used by fender on the necks at that time was nitrocellulose lacquer, and wore off much more readily than the polyurethane they have used since the mid-60s.
I think stripping is a very bad idea. However, you may be able to get rid of some of the gloss on the poly by using very very fine wet sand paper or even steel wool. The problem with steel wool, is that the steel particles can get into the pickup and elsewhere, and can cause really serious problems.
I have never done this, but I'm sure there are folks here who have. It is not an unreasonable thing to want. You might consider using a professional to do this and also have them roll the fingerboard edges a bit.
