Remove the visor from the helmet by removing the screws at either side of the face plate. Rinse the visor in clean, cool water to clear away large debris.
Soak the visor for five minutes in a bucket of clean water to soften dirt.
Add mild dish soap or eyeglass cleaning solution to the bucket. Wipe the visor with a microfiber cloth to remove dirt.
Rinse the visor and pat it dry.
Apply two to three spritzes of eyeglass cleaning solution and wipe with a microfiber cloth. Select a cleaner formulated for coated lenses. This process will correct minor scratches.
Purchase an eyeglass reconditioning kit to fill deep non-structural scratches; the kit will include a cleaning solution, scratch filler and secondary applicator.
Clean the visor with the cleaning solution; this will remove special coatings and expose the bare plastic. Wipe the lens with a soft cloth.
Brush a thin, even layer of scratch filler over the damaged areas.
Set the visor in a clean area to dry.
Apply a second layer of scratch filler to deep scratches.