The Sweetwater thing says just to use a regular guitar cleaner. Iwouldn't think that Fingerboard Remedy would be good for poly with beeswax in it. Seems like that would gum it up. I've used alcohol and lemon oil on satin finish maple, but I've never done a heavy poly.My guitar doesn't need this yet, but this is what I would use :
In this guide, we will show you how to clean maple fretboards. Cleaning maple fretboards are different depending on if they have a glossy or raw finish. Cleaning them the right way will remove dirt and grime from the frets as well as prolong the guitar’s life. Follow the instructions below which...www.sweetwater.com
I'm not really worried about damaging the poly so much as i don't want to gum it up and make it stickier.If it's a poly finish, there's very little that will hurt it. Polyurethane is tough stuff. Isopropyl alcohol won't dissolve polyurethane, nor will mineral oil or a little naphtha.
The carnuba wax will just give the finish a bit of a slick feel if you polish it, just like car wax.
I have one guitar with a poly fretboard, and I've never even bothered to clean it. A quick wipe with a rag has been fine.
That sounds more like Fret Ease, sprayed on the whole board, strings and all. Makes the strings slipperty too. But after a while, it gets gummy.An old bandmate used to clean his Strat's maple board with something that made it slippery as hell. I couldn't play it because my fretting was to heavy - the strings would shoot out from under my fingers as soon as I formed a chord. He had such a light touch it didn't bother him.