nope, nobody has.
but it's as easy as pulling the motor&tranny, wash/degreasing, and going crazy with a spray can. while you're doing that itd be a good idea to do an engine oil bypass and maybe install a radiator insulator
I agree, if you'd want your engine bay to be a different color, it would be alot of disassembling. Depending on if you're going to do it yourself as you can just take everything apart, wash/degrease and rattle can it. Otherwise paying someone to paint the rest of the car and you just clean the bay would be more cost efficient.