I have made a thin plastic bulkhead cover that fits behind the roll bar frame behind the seats, held in with a few cable ties. This is to stop water and road muck getting onto the seat belts and up into the cabin at the sides of the seat back. My car was only driven about 2 miles in the rain when I collected it on Friday and after cleaning I noticed the seat belts were wet and dirty. I removed the plastic back wheel cover to investigate and on my car the belts are exposed to the elements. I don't think it would have taken long to knacker the belts if left uncovered.
Stands on the list for first service