@Kazinator I'm going to leave the real-time clock area unpopulated, at least for now.
I will have to repair any corroded traces and vias connected to Paula, Denise and anything else that matters.
Luckily, the top copper layer (shown in red by KiCad) doesn't have a lot going on around the battery.
The only corroded traces I found so far are RAWLEFT and RAWRIGHT, which connect unfiltered Paula audio outputs to the video slot.