I think the FW wipe on poly should be fine for a maple fretboard. Actually, I'm sure any hard-wearing finish is fine.

I have used Tru-oil on a number of maple fretboards, and have sprayed Cabot's water-based poly on a bass. BTW, the sprayed poly was actually quite difficult to get off the frets afterwards. Maybe thinly wipe on the poly and avoid the frets where possible!