Not worth doing is it, most of its shaded so would really see the beauty of it shinning.
Job would only take 10 minutes to do both sides but would have to charge a fair bit as. It's in Mayfair then travelling time. Me personally wouldn't bother with it as hassle getting there and parking would be a big issue in Mayfair.
I'd charge at least £150 for all the hassle its gonna be, that's why Robs not touching it lol !!!!!! 😜