The grind @ mount snow.....and it isn't "my" shop, I just work here. When we tune skis the grinding emulsion and ground off edge material are all over the bases, making it necessary to hit them with base cleaner. The grinding emulsion is oil, which probably isn't good to wax into the skis.
Also, I should note that everything I say is my own personal opinion, not the opinion of mount snow as an entity. I think we will have to agree to disagree on this one, but I really don't think that base cleaner is as detrimental as you say. Also.... On the heat gun thing, I know people who have burned bases using wax irons, and you aren't saying those are bad are you?