We've had pretty good luck using "Pond Liner" for our surface. Its mixed with stuff from 20 years ago(I have no idea what it was, just clay/sand I assume). Our track was moved from its original location a couple years ago. So we transferred as much as we could. We often use Cheap Soda to help strengthen the surface. It still gets beat up a bit, but offers pretty impressive traction. We have to do this because here in Florida, it rains... allot. Check it out:
http://youtu.be/_7sJYrLu9Us
The local Track Farmers plan to try sugar and water this weekend. Some of them are watching this thread to see what other options we have. Its always fun to experiment.
