Coolant

[CoolVT@aol.com]

More and more I notice shops advertising that they install recycled or 
reclaimed anti freeze.  Am I to understand that the old stuff is just filtered 
and 
reused?  Is there a lubricant added for the water pump?  What else is done to 
it to make it reusable?
I guess I'm trying to figure if I can reuse what I drain out or if it takes 
some complicated process to reclaim it.
Mark L.