You mean go to a contest supplied fuel of equal parts of ether,oil and kerosene?  I do remember years ago a fellow pit man saying he had to be more careful as when he was getting ready to go to a weekend contest he spilled some ingredient on his hands.  He stated that he went ahead and finished up with what he had to do before going to wash his hands.  He woke up in the hallway halfway to the bathroom.  As someone stated over there, "Is there anything that is safe for us to really use"?  Yes we need to take resposibility for what we do.