How DO you clean under the hood?:)

With a damp cloth and tire shine works well on the platic covers and lids. I do not recommend using a hose or sparying directly on the engine, best to wipe things off.

^^^ Exactly what i do. I recently bought back to black that works great to.

What kind of tire shine specifically do you use?

You can use a pressure washer, I do. You just have to know what, and what not to spray.

I usually use a heavy duty degreaser and a hot pressure washer.