Quote Originally Posted by airsix View Post
That would definitely ruin a coated lens (e.g., one of those masks with a color filter coating), but are there really diving masks out there with plastic lenses? I know there are bathtub/pool masks for kids that have plastic lenses, but are there actually scuba-grade masks out there with plastic lenses?

I'm sure there's a "scientific name" for the type of lenses that some masks use... polycarbonate? That's the kind of lens material I was referring to when I said "plastic". IOW, I don't think that Bon Ami (et al) would be very good to use on those types of materials.