I probably ought to start a new thread for my LC III board from hell, but here is my survey of all the potentially corroded traces on my board. The more I dig into this, the more daunting it looks! The number of broken traces now numbers about fifty 
All the traces which pass through the damaged area near the battery are painted in white. I came up with this by using GIMP's magic wand tool to trace the paths from the PNG files. Now have a GIMP file with 50 layers, one for each trace and I can use this to figure out where to place wire bridges to hopefully avoid the damaged traces and vias. Anyone want to call the odds of me actually being able to get a bootable computer from this board?
@max1zzz, if I fail in this insane repair endeavor, I might have to buy one of your brand new boards!
View attachment Damaged Traces.png

All the traces which pass through the damaged area near the battery are painted in white. I came up with this by using GIMP's magic wand tool to trace the paths from the PNG files. Now have a GIMP file with 50 layers, one for each trace and I can use this to figure out where to place wire bridges to hopefully avoid the damaged traces and vias. Anyone want to call the odds of me actually being able to get a bootable computer from this board?
@max1zzz, if I fail in this insane repair endeavor, I might have to buy one of your brand new boards!

View attachment Damaged Traces.png