i have popped out both the front and rear windscreens. i've found the easiest way to remove these windscreens is to use soapy water and spray it around the seals before you start. makes the rubber nice and soft and you dont need to cut it. mine is soft and undamaged ready to re-use. this is the only rust that was underneath this seal. i think its pretty good considering this car was left in the weather out bush for nine years uncovered for the majority. the old car canvas tarp had disintegrated around it. probably a good thing in the end.