does the job on my box trailer exterior walls. black lines gone. spray , wipe, rinse.

Not only does this work great on the camper, it took the streaks off the gutters on our house. These gutters were new over a year ago. I wanted to keep them looking good so I decided to wipe them off when I cleaned the leaves out. The gutter streaks wiped off easier than the camper streaks!

<p>This is a great product...made our gutters look like new. Great price, great product!</p>

Removed the black streaks on pontoon boat quickly and easily but it did leave a chalky residue. I got a clean rag and water and went over residue a couple times and it was removed.

I have spent countless $$$ trying to find a product that worked. This is truly amazing. It took my pontoon boat from the salt/ocean environment to looking like new ! I am so in awe of the job and ease of which it worked, I ordered another 2 bottles to have in case it somehow is not available! Bio-Kleen Black Streak Remover has no competition in the market if you use it one time. Nothing else can compare. THANK YOU!