Better Boat Soap Concentrate Formula Cleaner Boat Wash 32oz

The dirtiest part of my boat is the top of the Bimini top. It's sat outside for 18 summers and hasn't been washed once. It was black with mildew. The Boat Soap label sounds too good to be true. They claim it cleans every part of the boat in hot or cold water, salt or fresh. OK. I gave it a try on my Bimini top. To be fair I used about twice as much soap as they recommend in 3 gallons of water and I used a Ryobi Power Brush to do the scrubbing. You can see from the photo how the cleaned area compares to how it was before. I was amazed! The black stuff liquified and rinsed off with a garden hose. Tomorrow I'll try it on my mildew stained white vinyl seats.