Just been looking around the bus and have noticed that their seems to be crazing in the high top roof mainly were it joins to the van. I know the roof is getting on now ....circa 20 years as it came off a 1990 T25. Is their anything that can be rubbed in to it to keep it supple so to speak. I do on a regular basis wash and wax the van but never wax the high top.
Is this an age related thing.....bit like wrinkles as you get older

Glenn.