My Bassanis were coated and the engine bay didn't seem as hot when running them.
Few years ago when the coatings were catching on I knew a guy with a 72 Vette with a 496 in it. We were doing some work on it as he was getting it running after a paint job. We'd shut down the engine and I was able to touch the headers within a couple minutes. That helped when checking the plugs. After that experience I believed in ceramic coatings.
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