Yeah but it's an excuse to clean it up a little which I probably wouldn't have bothered if I didn't see this thread.
Nothing special here, just stock. The valve cover didn't clean up very well but the rest is ok. I might look for another value cover to polish or paint oneday.
I just used Einszett 1Z Blitz cleaner diluted in a spray bottle, agitated with a brush where I could reach then rinsed off. Then sprayed 303 aerospace protectant over the engine bad and wiped it all down with a old microfiber.