plastic speedo lens

MAN. went to O'rileys auto parts. bought mcguries PlastX, 7.99. rubbed it on the lens like wax, rubbed it a few min, used cotton cloth wipped off. BRAND NEW LENS! no sh--

it had over spray of paint you could not scratch off, and that foggy look from someone putting armor all on it over the years. it got real clear and slick. so took panel appart and did all the plastic lenses. it has enought to do you headlights on your other cars also. prob 8 oz squeeze bottle. I WILL recommend it. wondering how it would do on the washer bottle and other items????