The paint on the trunk lid was in really bad shape, so I took the lid off the car and used paint stripper to completely remove all the old paint. It also needed some sanding to deal with the spots the stripper didn’t completely take care of.
I also started sanding the hood. I noticed that the paint thickness is very uneven- some parts needed tons of sanding to get through the topcoat to the primer, but other parts were down to the metal after a few seconds. I still need to decide if I want to remove all the paint, or just sand it enough to get rid of the deteriorated top layer.