I recently had my floors refinished and I removed all of the baseboards with plans to repaint them. They are original wood from the 70s that was stained and finished when it was new, some have what looks like oil based paint over the top, then white latex over the top of that from when the house was flipped in the 2010s. I’m sanding them down and patching nail holes, etc. and am thinking about primer. I’m not going to fully strip the wood, but what would be a good all-encompassing primer to put down to save me any headache with pain possibly not sticking later?