I wouldn't do anyone else's car just because but would gladly lend them my equipment and supervise their first attempt. Steam is good for caked on grease/oil and removes it quickly so you can find the leaks and make it a regular upkeep thing. We have a lot of gravel here so engine compartment gets dirty quickly even under it's cover! So a good vacuum comes in handy as well as I use waterless cleaner to maintain. Easy wipe on wipe off like your scrubbing bubbles but does contain some carnauba wax! JIMThat's exactly right Jim, not a job for everyone.
Tony.