Quarter panel removal?

What are the chances of me being able to remove the quarter and replace it without to much damage? The wheel well and quarter extension are already out .I would need to remove the sail lead, the spots at door and sill, along the trunk and the hardest looks like the the pinch on top of the trunk area.
My car had some holes in the wheel wells that allowed water to get in above the wells .So now I have some suface rust up in there but it is one hell of a place to get at.I have cut out the wells and can now get at the area but can't blast the area. I have been able to get a wire wheel in there and sanding discs and such and have it pretty well cleaned up but not perfect due to the limited ability to move and reach with a tool.I was going to use KBS coatings and then put it all back together but I'm not getting a real warm fuzzy feeling about it.So I really feel I have to remove the quarter to do it right! Any thoughts ideas sugestions would be appreciated!
Thanks!