Any Tips for Removing Full Quarter?

Use a grinder to take out the spots on the panel you are removing, it's trash anyways, right? There's a crapload of them Be careful not to damage the sub level panel.

An Air chisel, spotweld cutter , stainless gasket scraper/hammer/chisel are all handy.

You'll need a torch to get the lead out of the areas where the roof/quarter if non vinyl top and 1/4/tail panel join