Facing sharpening five neglected plane blades and realising my stones weren’t wide enough to hone on the sharpening stones I had, I used readily available wet/dry paper in various grades on a flat surface. Plexiglas or glass works to maintain a flat surface beneath sheets of sandpaper. The sandpaper is easily rinsed and wetted down to prevent loading and easily replaced when worn. Using sandpaper on a flat surface bypasses the need to resurface a stone to maintain that flat surface. And it gives you more room for longer strokes without running off the edge.