The garage walls are finished, but over time they have certainly shown their wear. But this is certainly not a high priority item.
In Sept 2019, we decided to re-paint the East exterior wall, or at least half of it -- up to the window. We took everything off of the wall, and used masking tape all around the edge. We patched the sheetrock where the paint or texture had problems.
We painted by hand the patches and all the edges.
Then we used a roller to paint the wall itself. Remove the masking tape. Put the outlet cover back on. Done with this side for the moment.