Cast iron exhaust manifold cleaning

ProjectBazza said
Now I’m curious….

Do any of the products and methods mentioned above work on headers? Can’t say that I’ve ever seen a header that didn’t look like crap.

And my apologies to the OP for somewhat highjacking this thread.

i have a friend that uses the eastwood stuff on his headers. seems to hold up ok but needs to be touched up from time to time.. he touches it up with a foam brush...