I mist the whole bay with a diluted 1:1 Lowes citrus dergreaser - I cover nothing, but I MIST.
wait 15 min and MIST again with either rinseless or water (hose)
dry and spray with Wolfgang Vinyl and Rubber sealant...Here's my "13 accord engine bay after a detail. Look at the radiator hose...nice and clean, not shiny..
