Welcome to Photoshop Gurus forum. Register a free account today to become a member! It's completely free. Once signed in, you'll enjoy an ad-free experience and be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!
I'd recommend a selective color adjustment layer. Adjust the blacks to get the grey tone you want, and then adjust the neutral tones to white for the look of reflections, as I did here.
Actually I'm going to play around with Hawkeye's method, I like the way it came out.
I learn something new everyday on the forum.