Prepare a soap water solution by mixing a little dishwashing liquid soap with warm water in a bowl. Dip a soft cloth in the bowl, squeeze out excess water and wipe the helmet all over with it.
Gently rub a scrub brush over the scratches to even them out and remove them. Rub the helmet until the scratches have evened out.
Wipe the football helmet dry with a soft, dry cloth. Invert it, and let it air-dry for approximately 12 hours.