Yes you can, here's a quote from Polished Bliss from another topic:
"Sounds like bonded surface contamination to me (which could be anything ranging from industrial fallout, to overspray, to tar, etc, etc). The first thing i would do is to clay the glass using an aggressive clay bar and a lubricant, as this should exfoliate the contaminants away, leaving the glass perfectly smooth again - the wipers will then behave perfectly, providing they are not damaged in any way. More details on claying can be found here..."
Remember your lights probably aren't glass though if that's what you were thinking ....