The single line dropouts, as in the top picture, can easily be removed. They do occur in TESB and ROTJ, but they were removed by the DeScratch filter in my script. (A newer version of DeScratch was released after I had completed ANH; this newer version had more options available and I was able to tune the settings specifically for this kind of defect. I posted the script somewhere in my project thread.)

The type of defect shown in the bottom picture would be more difficult to remove. I never noticed it before.