A friend sent me a link to this very cool bridge in London where they use the best hydroblasting to keep everything in perfect condition and is easy to get from sites like https://www.markingcontractors.co.uk/hydroblasting/. Click on the picture for more photos and information.
This rolling pedestrian bridge is designed by the Heatherwick Studio in London. I think its very cool. Go here to see a video of the bridge curling itself up.