Is there a way to remove the frosting? I'm not familiar with the process. Would using turpentine or other paint thinner remove the frosting. Or perhaps a Goof-Off or Goo-Gone astringent might do the same....Do a test piece...not the actual visor, don't want to ruin that just yet. You'll have to over-frost a separate piece of the visor material (Not sure what you used) and then try to remove it. It may ruin the visibility though. If it's raw untreated plexi-glass, it may absorb some of the astringent and cloud it up. Then it will be just as if you over frosted. At that point , you might have to start from scratch.