[frayedends]

Originally Posted by New Englander

The stains you are seeing is rust. I use this product. No Mixing and works great. Spray it on the stains, wait a few minutes and hose it off. Easy Peazy. Find it at Lowes.
https://www.lowes.com/pd/Super-Iron-...leaner/3578096

Close, but a better product is this one that is made for outdoors. One thing I would caution, it is a strong acid. It has hydrofluoric acid, which is some nasty stuff. Wear gloves, spray it on and when the rust is gone rinse it off well.

I use this stuff up here in MA on my siding. My well water has horrible iron and this stuff is amazing. I tried all the other garbage, CLR, vinegar, etc. They are useless.

RustAid Goof Off Outdoor Rust Stain Remover, 1 Gal. - Removes Lime & Calcium, Scrub-Free - Ideal for Outdoor Surfaces in the Rust Removers department at Lowes.com