STAR BRITEBlack Stain Remover Spray - Instant Black Streak Eliminator for Boats, RVs, Campers, and More - Safe for Fiberglass, Metal, Plastic, and Painted Surfaces - 22 OZ (071622P)

This stuff actually works! I used it to clean my RV and it made it cleaner than it was when I first brought it home! The secret is to use this before you get the surface wet. Spray it on, let it sit for about 30 seconds, and then rub it with a rag. Black streaks gone! Yes, it takes a while to go ove rthe entire RV, but it is worth it!

This is the best product for cleaning black streaks off boats and aluminum gutters.

Did not do the job that the manufacturer claims. The seller performed his sale properly, too bad the product didn’t work!

As described!

This is the only product I could find that really does what it says. Removed the black streaks from my aluminum like a charm.