Rust inside Tailgate - Options?

[jcpetrson]

My tailgate is in pretty good shape on the exterior, but there is definite rust on the interior. Searching through old threads, it seems that some people have thinned out POR and slossed it around to coat the inside. After a couple of years, did that continue to work?

Comparing POR to other methods, has anyone tried the NAPA Rust Treatment? It cleans with water (?) and leaves a waxy like surface. It's also a LOT cheaper and available at my local auto parts store.

What's worked for everyone else?

 

[AZ73]

You can try one of KBS's products. Depending on what you want to do.

https://www.kbs-coatings.com/

I didn't use their cavity coater, I think it's more like a heavy duty wax. I did their 3 step process. they have a motorcycle tank kit that's just a smaller version of their system. Since I'm doing my entire frame, underside, and inside floor, I bought enough to do the inside of the doors and tailgate too.

 

[jcpetrson]

Thanks for the advice AZS. That looks like the right way to go. I wish the local auto store would pick up these products. I hate spending 25% of the $ on shipping it to my house.