Last night we got the inside of the cut glasses up and got the backing plates removed. While it was back off of the bed I roughly trimmed it along the body also. Using some kind of a backer on the outside it the way to go it looks like. The area we had to make to raise the top is almost completely smooth. You can't hardly even feel a transition. I also decided to grind down the holes for the marker lights and tonight ill fill those from the back just using a couple layers of 2" masking tape on the outside as a backer.
These next 2 you can really see how smooth of a transition it is if you make a solid backer on the outside. Just be sure to grind the screws off that are sticking through the inside before you lay your matting down.
The area that meets the body isn't done yet but it's just roughly trimmed in and you'll get the idea.
A shot of the transition and how smooth the new area will come out with a proper backing.
This side is basically done now with the exception of the marker lights. I just have to trim it and do a little filler work.