Avoid fumes; this work really should be done outside during the heat of Summer ... with a breeze . 
 
I don't believe transdermal absorption is too much of a problem . 
Wash hands well after or wear gloves . 
 
The fumes IMO are the real threat . 
Do this outside or with a lab grade venting fan . 
Temperature is a factor also .
		 
		
		
		
		
		
		
		
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