Biokleen M00509 Black Streak Remover - 1 Gallon., 128 Fl Oz (Pack of 1)

This stuff works great! But there are a few things to know before you buy this.Number one, it is Extremely strong... That means you wear gloves. I didn't but I never wear gloves no matter what chemicals I'm working with, I. Don't really care because my hands are so tough, nothing bothers them.... This stuff turned my alligator bulletproof skin into baby skin In one panel. Which is great because the wife is always complaining About the the escalator and elevator grease I get under my fingers and in the dry cracks From work, this cleaned it all out.Number two, this is not good to use on very, very old thin trailer paint. My trailer is 7 years old and has never been washed. The paint is aged and has years of acid rain chewing into it. Many years or minerals and deposits from rain and trees that has been building on it. I could see where this was starting to eat through the paint so I worked in very small areas and worked very fast.If you're careful even with thin old worn paint, it will still do its job without damaging. You just have to be within seconds of being correct on when to scrub, apply and rinse... Very, very small margin of error so if you're not really good, don't do it..If you let it get on aluminum like fenders, it will etch into them. And then you will be polishing them later. This stuff and aluminum don't go well together.But all in all this stuff is strong. And that's what I wanted. So it is perfect for what I need. And you can see by my pictures it does a pretty good job.Use it full strength and work fast and small areas.. I don't care how tough your skin is wear gloves!If you're a mechanic, do one panel without gloves, it will make your skin look great and soft and your wife will love it No more complaining on how grungy your, your hands look anymore.

This product works better than the store bought blue bottle camco stuff I’ve seen at Walmart and Camping World. Don’t expect it to work instantly, but if your willing to give it some elbow grease you can take out those stubborn black runoff streaks. I’ve already recommended it to my family who all own campers and popup’s.

Does remove black streaks well on camper but prepare to use some elbow grease. Definitely use gloves, will be rough on skin if comes into contact

I don’t do many reviews but I do them when I run across a great product. This is one of those. I have used several name brand products that do very little to get rid of black streaks. Wasted a lot of money. This stuff took the black streaks off without having to scrub! Amazingly easy! Now I will get the travel trailer clean and will wax the entire camper. I have learned that the black streaks will wash off with a regular wash IF you have a good wax coating at least once a year. The section I had waxed last year was easy to get rid of the black streaks with a regular wash.

Pour on rag , wipes of 10 years of streaks with little effort.

Remove the black streaks as advertised

Got the cleaner, used the cleaner.Black streaks gone.Spray bottle is bestA+

I have used this product for years on all my RVs. It removes all the streaks and grime.

Hurt my and didn’t wash my trailer from October to July. Black streaks were covering the RV. Sprayed the product on and after 5secs it cleaned black streaks completely off. Tried lots of products, this one will be my go to.

I really thought this would be great given all the good reviews. It takes a lot of manual effort to get the gutters clean. I didn't have a lot of build up yet I couldn't see where the white gutters had oxidized so it removed some of the finish in a few spots. It says to not clean on those areas. It did removed some of the overspray from painting the house on the metal soffits! That was a good bonus. After noticing that it took off paint, I was even more cautious to make sure I didn't overspray on the siding. Spotty looking finish with removal of black streaks and spots even going over it again. It seemed that the cleaning only happens on the first spraying of the product so if it wasn't wet or dense enough, I was left with spotting or what looked like smudges. I used it full strength as was suggested. Not impressed and for the price....... I will look for something else next time.

Tried Black Streak remover last weekend and it was not that great. Worked a little better if I let it sit for a while and then sprayed some liquid on a Mr. Clean eraser and then scrubbed

Play safe and go for 50/50 with water. Try to avoid sunny day and keep rince it with water. Do one small spot at the time.It’s really strong be gently over sticker’s.Worth every penny use microfiber and rinse it as you go.Expect to rewax after the job.

Cleans, but was hard on the paint on our seasonal trailer. Used another brand that took a bit more elbow grease, but was easier on the paint.