I use Dicor's cleaner and protectant. Easy spray on. I use a sponge mop and bucket to first damp mop the roof to remove any dirt, then, working on about 6 square foot at a time, spray on the cleaner and mop off with clean water, changing the bucket full several times. After the roof is clean I start over with the protectant and damp mop, just spraying on the same size area and spreading it around. As far as using the bucket instead of a hose, I use that to keep the white stuff from running down the sides of the coach. I have the DW help by standing on the ground and I lower the bucket on a rope, she dumps the dirty water and refills the bucket, which I hoist back up.
2001 National Tradewinds 7370 300 Cat
2011 Jeep Wrangler Unlimited Sport
Officially fulltiming. The Journey Begins