Would a small generator, pressure washer, and several buckets of water (refilled from stream?) be effective??
I wonder how CAN got the sand blasting kit into Froggatt. Neil should be there on Weds.
The stream isn't too far away (50yds?) to ferry water and an empty container wouldn't weigh much. From memory pressure washers don't use as much water as you might think. Question is if it'll shift the paint.
I found a water source next to the main path, is that the one you mean or is there one closer?