Don't they make slap covers (bronze or copper metal covers to go on your fingerboard where you slap) for fretless basses? This sounds like it would be useful not only tonewise (if that could affect tone) but also keeping the fingerboard somewhat safe.
If anyone knows if this sort of thing even exists please post a link or atleast what these are properly called.
If anyone knows if this sort of thing even exists please post a link or atleast what these are properly called.