I am thinking about making a slow speed wheel such as has been described here. One idea that attracts me is a 24" diameter or larger HDPE wheel about 4.5 inches wide, to which I could attach wet/dry sandpaper of my choice of grit. Match the gearing to get about 20" per second perimeter speed. Attaching the sandpaper is problematical. But here's what's available: http://www.onlineindustrialsupply.com/weblplbasaro.html
HDPE is quite expensive, but HDPE cutting boards are not.