The Energon Pub

So, I'm completely and utterly new to the whole customization thing. So, I decided to start small. I got one of those 2001 Cliffjumper keychain reissues for a first practice run.

I took the whole Cliffjumper apart to better paint it, and found out that the windows were glued in to the main part of the body.

Is there a way to remove the windows or soften the glue somehow, so I can paint th body and then pop the windows back in?

..Or should I just go the tape route?