It's fairly simple to do.
A little bit of sanding and/or filing will do the trick.
Some good experience with sanding/filing would be needed, but patience is the key.
The only hurtle, that I could see, is if it's a finished maple fret board. Then you would have to re-finish the worked areas.
What kind of wood is the fret board?
Zõ§õ
The power that music has to connect people to each other has always been one of the guitarists driving forces. - John Frusciante
Axes'
R-Axe Guitars "Black Betty" - 1st Ultimate DIY
Ibanez X-Series-DT350 (Star Shape)
Ibanez AEG10E - Black
Yamaha RBX200F Fretless w/DiMarzio DP127 Pup
Amps
Peavey 110 Audition
Pedals/FX
CryBaby 535Q
DigiTech CF7 Chorus Factory
BOSS BD-2