Can the rear window tint be removed without damaging the defroster? Has anyone done this or had it done?

I would have a professional shop do it... just my opinion. But yes, it can be removed

yup easily, check this link:

http://www.doityourselftint.com/window_tint_removal.htm

use a steamer. get the tint warm and pull it slowly off. i work at a shop in VA and thats how we get the tint to come off and the glue comes off with the tint. If you leave glue and have it retinted you'll be charged extra be careful. i suggest you let a pro do it. not an easy task

^Good call. Cuz tinting over tint sucks