BiokleenBio-Kleen M00507 Black Streak Remover, 32 oz.

I recently bought and enclosed 24 foot car trailer that had not been cleaned on the exterior for many years. Consequently, there were multiple black streaks down both sides of the trailer and the entire trailer look dingy gray instead of white. I tried this cleaner and it definitely works. I will also say that because of the size of the trailer, I wanted to try other options that might be more cost-effective. I can say that I got the same or better results using Zep concentrated citrus degreaser and some 000 steel wool (didn't scratch baked aluminum paint at all) and it was much less expensive to buy a gallon of that and a bag of steel wool. It also wasn't any more work because the Bio-Kleen also required using a stiff brush to get the heavy deposits off in places and scrubbing in others. So does it work? Yes. However,for my needs, I will use the citrus cleaner and wool moving forward because it is much more cost-effective with no penalty to results.

This stuff works GREAT!!! I'm always a little leery of this type of product, but it works EXACTLY like the videos show. Sprayed some on an old terrycloth hand towel and wiped off the black streaks completely with a couple of strokes. NO SCRUBBING!!!! Light to moderate pressure on the towel and just wiped 2-3 times. I have a 2005 Bennington pontoon boat that I have not cleaned for years because is was such a pain before. Took me less than an hour to go around the boat and clean the metal sides. Did not affect the decals either. If I could give this 6 stars, I would.

Super easy to use. Spray onto cloth or disponable rag, simply wipe, rinse off with water, and viola! Perfectly clean car or RV, boat, cycle, etc. Great for white and other light colored vehicles. Gets off the streaks even the best car wash won't get off. Uses very little product. Complete love!

The stuff actually works. I tried everything under the kitchen sink, literally, until giving up. I still had the black streaks running down the side of my aluminum sided camper. I broke down and ordered this after seeing you tube videos of it apparently working for the dreaded black streak. I really couldn't believe it, but IT WORKS. Yep, I'll say it again; IT WORKS. As long as I have my camper, I'll have a bottle of this around.

I was looking for a way to get rid of the back steaks on the side of our camper. I tried pressure washing, soaps, and some cleaning waxes with no luck. I searched on Amazon and found this product. All I can say is WOW! It works. Immediately and without scrubbing. I sprayed it on and used an old dish towel to wipe it off. I cleaned my entire camper with it and there is still more than half a bottle left. I would absolutely recommend this to anyone. It is worth the few extra bucks over the other cleaners.

I've tried everything on the black streaks on my camper without much success. Then I tried Bio-Kleen, full strength, and using a Magic Eraser the streaks are gone!!! Did not remove them entirely from and Decails. And Make Sure you Wax because now the paint is needing protection from more streaks

At first I thought this product was amazing and then I realized that it actually made more work for me. This product does definitely remove black streaks, along with wax, it basically strips everything off of the surface you are cleaning. After using this product I noticed dullness and hazy spots that had the most streak buildup. I was able to bring back the shine to my RV, only after buffing and waxing the entire thing. I used this product on 2015 Salem TT that has both plastic and aluminum surfaces.

The only black streak remover that works. I tried a multitude of different black streak removers that did not work at all. I believe the only reason they removed some of the black streak was because of the elbow grease I put behind them. This stuff takes a bit of scrubbing but removes the black streaks without any problem. I would suggest following up with a good coat of wax over top to protect the surface because the chemical used in this is quite harsh.