Questions about 340hp manifolds...

Hey All:

I've got a set of the 340 hp manifolds. I want to run them for a while, but they're in really good shape and I'd like to keep them that way.

Is there any kind of coating to put on them that doesn't really look like coating?

What do people use for gaskets with these? Can I just use the same gaskets I would with headers?

Where do you get the hardware and gaskets for these things?

Thanks for any help

Steve