I would like to start out by saying "hello". I bought a used jeep a couple days ago. I have a quick question. Whats the best thing to do with door hinges that are starting to rust?

Thanks and keep on Jeeping.

WD-40?
And hello.

take them off, either replace or paint them. There way to really stop rust on the surface.

Starting to rust ... sand or wirebrush (rotating steel brush on a drill makes it really easy) the surface down to bare metal, prime a couple of coats and paint a couple of coats, then clear on top of it. It sounds like a lot of work but it doesn't take too much effort ... just some time to let the coats dry between applications. Some primers dry in a matter of minutes.

As far as the paint, I would buy the spray can from the dealer ... just give them the VIN number. Since it's starting to rust in MI, I assume it's a newer jeep :D

Starting to rust ... sand or wirebrush (rotating steel brush on a drill makes it really easy) the surface down to bare metal, prime a couple of coats and paint a couple of coats, then clear on top of it. It sounds like a lot of work but it doesn't take too much effort ... just some time to let the coats dry between applications. Some primers dry in a matter of minutes.

As far as the paint, I would buy the spray can from the dealer ... just give them the VIN number. Since it's starting to rust in MI, I assume it's a newer jeep :D
What about por-15?? (website-por15.com) From guys i know that have used it on there hot rods swear by it. A custom painter neighbor of mine swears by that stuff..