Yeah, I score the line with the back side of a new #11 blade. You have more control that way. Once you cut it off, clean up the edges of the door/trunk as well as the body then tape it back in place. Then bend yourself up some paperclips and use some small tubing to mount them. Some dudes use brass, I use plastic. Make sure to mount the hoop at the centerline of the new crack you created. Don't mount the hindges backwards or you will do what I did on the '56 Bel Air above. This may not be the correct way to do things but it worked for me. I guess since its not a scrap body anymore I guess I should clean up the right front quarter...