I'm just about to start on my first ever EPP plane, a TufFlight Bouncer. The TufFlight guys say sanding is best accomplished with 40 grit paper mounted on a solid sanding block. That's what I plan to try. But if it doesn't work too well, I'll just leave the finish as it. I plan to beat the plane to death practicing low and slow 3D stuff anyway. I'm too chicken to risk my bigger planes.