Hey guys I was just wondering if there's a spray that I can use to prevent an all metal radiator from rusting?

 

Usually they are aluminum, it radiates heat alot better.

 

Do you have one of those black aftermarket ones? I would say give it a nice coating of high temp paint. If you have an aluminum one, you could use never dull on it to make it shine and keep road gunk off of it that could cause rust later.