Protecting metal sided camper

Just last weekend, I bought a brand new 32ft travel trailer. It's a ribbed, metal sided on so it makes it harder to do what I want to do. I'm wanting to protect the exterior surfaces but not sure what products will work the best and without having to spend days doing it. Is there a coating that is sprayable compared to applying with an applicator or do I do a sprayable sealant a couple times a year? If I do a sealant, do I need to do a spray was as well? Not sure what route to take. Any input would be definitely appreciated.

One consideration is a product called Protect All. It comes in a spray bottle and can be used on many different surfaces including exteriors and even the interior of your TT. I have not used it but have read good reviews on it.

I have the exact same question. I too have a metal sided travel trailer and confused on what I should use to clean and protect it.