Works like a charm on my Hunter wellies. I recently found out they had what is called "blossoming" and didn't know what to do to return back to normal. I found out online that using Goo gone and then Armorall would help remove the white marks, and also give them back its shine and protect them for the upcoming winter.
The item arrived promptly, and I couldn't wait to test it on my horrible looking boots. Both things worked great! My black Hunters (not glossy) look fantastic now, even better than when I purchased them.