The tough part will be getting a cutter in there to remove the spot welds. The answer is "yes" it could be done but it will be one hell of a job !! If you are going to tackle it I'd suggest cutting most of it out from inside the trunk and then you can get at most of the spot welds from inside. The tough ones will be where it joins the trunk panel. Those could be tackled with a die grinder or something like that. Good luck !