After the last post on sanding a Donaldson Trailing Edge, I thought it only fitting to show how I take our foil tuning one more level.  Do you have to go through all of this sanding and work to have fun with your foil gear, not at all.  But for me who is always experimenting, testing, and learning, it is fun, and I feel the difference, as do foilers in our group.   One caution is don’t sand too much, you can break through the clear coat that is on a lot of foils and that will mean spraying clear…