I am worried that my bonnet might be oxidizing or something. It's hard to take a pic of it but best explanation is that when I look in certain angles in bright light i can see patchy dullness almost like how it looks when it is really cold outside and you get moisture patches. I am thinking to clay-bar it and see how it looks after. Will this help? car is low mileage but about 6/7 years old now.
I clay bar won't help on its own but it will help before you polish it. Try polishing a test spot, if it removes it you know it needs a polish, if it doesn't it could be clear coat damage, which I dowt it is.
So I had machine polished. It's bought some life back to it and has some shine now. It seems the sun just made the white paint very dull. So question is, how can this be prevented? After every wash shall I apply some kind of on the bonnet ?