This fall I used the LA Awesome to clean a VERY bad case of black streaks off a painted 1998 steel gooseneck. The cleaner absolutely lives up to its name. The streaks, some having been there for years, came off in two spritzes from the spray bottle and one swipe of the sponge. I was both stunned and estatic. In no time at all that disgusting trailer was sparkling (and I mean that literally because it truly gleamed in the sunlight), and just yesterday I inspected the still clean paint to find it still sparkling and no damage whatsoever.
For the price you can not beat it. $1 for the spray bottle, $3 for the gallon container.
That said - I had used it on the bare aluminum trim of the trailer, and it did NOT remove the black streaks at all without a huge amount of elbow grease with an abrasive scrubbie. Even then there were traces left.
I had tried all the other stuff - Simple Green, etc - and none of the other branded cleaners could do in one swipe what this cleaner does to remove black streaks and trailer road dust that leaves a dull gray film on the trailer paint.
Edited to add: I had purchased the spray bottle ($1) first because I wasn’t sure if this product was bogus or not, but as soon as I saw how phenomenal it was, and SO EASY to use, I bought the gallon container ($3) the next day. The only place I could find it was at the Dollar General. It doesn’t appear to be carried at any other stores.