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			Hi all, 
 
I am confused. It seems we have to sand the outside of the lenses , so why having to open it (in an oven, etc.)? 
 
For those who use a sanding pad on an electrical drill, can you list the sequence /profession of the grit you used to ? I.e 30, 60, 80, etc? 
 
Thanks!
		 
		
		
		
		
		
		
		
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