I had some chain that had surface rusted and was a mess to carry. Since we drive on a very sandy road occassionally going to the farm, I tossed them in the truck on the next trip.
When we got to the sandiest part, I stopped, hooked the chains from the bumper, and pulled them 1/4 mile. Stopped and flipped the chains end for end, and drove another 1/4 mile.
Nice and clean then!
Ron