In all honesty people.....products like OCW, Clear Seal and OptiSeal are so easy to re-apply that durability takes a back seat.
I mean if all you had was OCW and you washed your driver weekly and then spritz the hood, trunk and roof with OCW you would be always protected and it took you only 10 minutes at the most. Same with CS, OS and the Ultima product.
You should follow a schedule something like this.....one week do the hood, roof and trunk, next week do the side panels, skip one week and the fourth week do the whole car. Durability would then be of little concern.
Personally if a product gives me 3 months of protection I'm happy. I often find the ones most concerned about durability are the same people trying something new on their cars every other week.....kinda ironic, eh?
Anthony