It shouldn't be a problem. The fret dress tools (at least that I know of) are for single frets, so the fan won't change the procedure. Any component tech or luthier should be able to handle it.
That said, Dingwalls show fret wear differently to parallel fret basses. You see the fret wear very quickly because the frets aren't perpendicular to the strings, but the wear is always MUCH less severe then you think at a glance. Unless your bass has been played for many years by someone who plays A LOT it is not a problem.
You'll get that same assessment from everyone here, as well as Sheldon himself.
I understand wanting your bass to look pretty, but it's very unlikely that it needs a fret dress.
The P-Tone pickup in series is a tonal kick right in the nards.
