Today I decided to clean the engine bay. Never done it before but ...
Looks pretty good.
Funny, though, how many little nooks and crannies there are in the engine bay, what with all the hoses, cables and whatnot. Can take several hours to go through everything, even a second go at it once the initial crud's gone.
It's been awhile since I last did mine. High time to get to it. Myself, I've used the BlackFire Super Degreaser product. Full strength, it gets everything, but diluted it can also make quick work of recent deposits.
Haven't used the P21S product previously, but many have. Once my BlackFire stash is gone, I might well pick up a jug of the P21S stuff.
Like you, I try to be a bit cautious about water in the engine bay. Elbow grease, with a 'spritzer' type cleaning bottle, and time, followed by another 'spritzer' bottle of water for the rinse, does pretty well.
Many put on a "dressing" coating on the cleaned bits, after all the cleaning and rinsing is done. Have yet to do that, on my own vehicles.
Wipey, wipey, wipey ...
