I have an open face with US Snell, and DOT rating-tjough it will be replaced after next year. Once in a while you can find an open face fiberglass/kevlar helmet-so that you can paint it. I think I will next pop for one of these, and paint it a nice egg yellow. You could even do this with a modern full face, as long as it is fiberglass composite, and not polycarbonate or plastic.
I found a Moto Star about 4years ago-at a thrift store in Tucson, Az. I gave $ 3, stripped it, painted it, replaced needed lining parts from Bell, and wore it once. I gave it to my Uncle, to display in his fabrication shop in Louisiana. This way, I am not tempted to wear it.
BTW I would have thought by now that at least one decent helmet maker would make some helmets in solid colors at the under $250 range. During the Stanton/Bradshaw era they were readily avaliable in wht. Most of us bought the wht helmet and had it custom painted(don't ask-this was the same area as hair bands and mullets). Were a safe open face in wht, and a safe but not to techno looking full face available as the same-I think they would sell.