I just took mine off the parts car. There are clips behind you need to release. I used a regular moulding tool. It was a pain. I also cut the rubber gasket back as far as I could. That helped. Just be super easy & patient. I was able to save most of the clips if you need any
I found that the tool removed the clips, but some of the factory butyl stuck to the trim made it "seem" like the clips weren't releasing the trim (if that makes sense). BTW, be careful with the tool, I blew out my rear window trying to get the damn trim off. Don't be in a hurry like I was!