You could try. But it might be kinda hard at speed and you'd have to remove your air filters.
I would have thought someone would have replied to this by now on a more serious vein.
I'm pretty sure what you see there Dale are just products of combustion. Probably the result of the various additives they put in the gasoline today. I see similar deposits on turbine blades from time to time when they run on liquid fuels.
I would not worry about it unless it started to become a serious deposit and prevented the valve from cooling thru heat transfer.
Others more knowledgeable on white deposits like this might know exactly what they are.
In the meantime, put a little Lotrimin AF in your gas tank and that should keep it under control.
regards,
Rob