73 Camaro I have the rear section and the trunk pan I need to tack weld on. Problem is I never have done a de-panel / de-spot weld operation and I am nervous in doing so. Sure I can tear off panels and figure it out along the way. But I want to do it the right way. So is that drilling out the spot welds first? or cutting it out close to the seams then drill out spots? Trunk is pretty rusty/gone so not too big of a deal. Just having trouble figuring out where to begin. If rear taillight section is out, will whole pan fit without cutting it up. What do I do around the bumper bracket area?