I meant to post this about a week ago but completely forgot. On the approach to Millstone from the top of the Surprise View carpark, just before you reach the fence that runs along the edge, one of the small boulders in the bracken has been painted blue. I'll try and post a photo if I can work out how to get it off my phone onto my computer.
Looks a right mess, hopefully there is a way to get it off before any one else thinks it's a good idea and takes their tins of paint up to Trackside or the Pebble, etc