05-17-2011: 2 hrs
More edge prep for the elevator stiffeners. From now on, I will follow these steps for all my edge prep unless I find a better/quicker way to do it.1) Scotchbrite wheel on bench grinder to remove all machining mark
2) One pass using the edge deburring tool on each side of edge (about 45deg)
3) Sanding using a coarse sand paper
4) Sanding using a 400grid sandpaper, then call it done.
Stiffeners's edges are smoothed
