I think this was referred to in another post on how to keep wheels black and engine parts same. I found that probably because I was cleaning straight after a ride that there was a whitish residue left making wheels and engine look grey. Snow foam, wash on a still warm engine. Tried this stuff and it works a treat. Black wheels are back to black as is the engine. Just spray on, work in with a soft brush and rinse off. Excellent product like so much from AutoGlym.
www.autoglym.com
I also use their Coat-It wax in a snow foam gun and that as final rinse . also works great.
Engine & Machine Cleaner 1L
Safely clean your engine bay with our Engine & Machine Cleaner. It’s tough on stubborn dirt and leaves you proud to lift the bonnet again.
I also use their Coat-It wax in a snow foam gun and that as final rinse . also works great.