Worked well on aluminum pontoons.
I purchased this product to clean the pontoons on a boat that was docked all summer in freshwater lake.  The product did a nice job in cleaning up the pontoons.  I ended up mixing slightly stronger than the started recomended starting point.  On my boat I power washed the pontoons, sprayed on the cleaner, let sit for recommended time, and they washed off.  The 1 gallon will last probably 5 seasons cleaning the 20 foot pontoons.
Rating: 5 stars