Yeah, this is the perfect way to get that show car finish under the hood for sure.I use carpro perl diluted 1:5 and 1:10 to "dress" the bay. It's magical stuff and goes a very long way when diluted. Not greasy or sticky and really makes the black areas pop.
I use the same method and get awesome results for my purposes. I have a dedicated engine brush and micro fiber cloth that makes this job quick and easy. You can pick up any type of cheap nylon brush to do the job. It's quick and easy to maintain too. Main thing is to not spray directly into electrical parts (fuse boxes, alternator, wire connectors, etc.)To maintain my engine compartment... I use a .25 diy car wash with nice psi pressure. I simply use the soap selection and then rinse with the water. I also do the same to the underside of the hood. Then dry as normal. End result a spotless engine compartment.
No additional chemicals or prewash/degreasers needed.
I like the clean look ... so I donāt spray any dressing on the motor or hoses (just collects dust imo).
I also like to clean the wheel wells and underside the same way.