My engine bay is mighty dirty, needs a major clean up. What would you recommend to make it nice and shiny? (I would probably need a degreaser for the plastic piping and aluminum parts).

303 Aerospace cleaner. There is a thread about cleaning the engine bay that is real informative. Do a search.

P.S. Not the one about armour all.

Yep, found that thread. Eitherway, thanks for the tip.