Objective: How to sand the edges of the wood.

Which of the following solutions is more sound in terms of naive physics reasoning?

OPTIONS:
* Using a belt sander, place the edges on the sander until all edges are smooth.;
* Using a rough edge of a sponge, place the edges on the rough edge until all edges are smooth.;
Using a belt sander, place the edges on the sander until all edges are smooth.