I’ve not noticed this to be a problem except on old Kubotas that were stored outside. I’ve seen plenty of 90s model vehicles with peeling clear coat so automotive grade is very reassuring. Even if you had the best paint in the world the sun still destroys plastic, hydraulic hoses, tires, and the seat. If you care about your equipment you really need to keep it out of the sun. My 2011 JD backhoe has likely been stored outside it’s whole life until I bought it last year and it has quite a bit of sun damage.