When you skin it be careful around the vent (anus). They can tear there. I take scissors and cut around each side of the vent before carefully pulling the skin off the body.
Make sure its good and dry before rolling it up and storing it or you will have a moldy mess. Once I think a skin is dry I'll take it off the board, trim the belly scales off the edges, and then hang it up by a clothespin in my work shop for a couple of days just to make sure. I don't want a moist skin to ruin my stash of future bow backings.