Cast iron exhaust manifold cleaning

Once blasted, wipe with brake/component cleaner, then brush on with POR15 Manifold grey. That stuff goes far, is durable and can be touched up with brush. It has the consistency of thin toothpaste, but coverage is above excellent. A small can will do 5 sets, 2 coats each of sb manifolds easy.
POR-15 High Temperature Paint - Gray - 8 fl. Oz. - High Heat Resistant Paint - Withstands Temperatures of 1200 Degree F | Weather & Moisture Resistant https://www.amazon.ca/dp/B00J6B1JZY?tag=fabo03-20