i don't clean my belts, except by putting my finger on them sometimes to rub off some of the metal dust. i should get one of those rubber eraser things for cleaning sanding belts and disks.
on the coating-i suggest using some sandpaper in your hand to rub it, or go it slow on the platen.
i love the 1x30, and those leevalley belts are great. i orderd a pile of the blue belts too, and use them all the time. i like to use a 120 grit belt to start with to set the bevel angles and thin out edges. then i take it down from the 80 micron to the 9 micron. i buff the wire edge off on a stiff cardboard wheel on my grinder.
welcome to the 1x30 club! feels good doesn't it?