Thank you for the info, Mike. I've seen incorrect directional use of a rotary buffer that has burnt through a clear on curvy/sharp edges before (not my car).
Would I need the medium grade towel to remove the overspray or the fine grade would be enough?
I have a bottle of Meguiar's Scratch X...
Unfortunately, no. I've always maintained the car by hand. The car & its paint have been maintained over the years with wash & wax + occasional clay, and the paint + clear are in ok condition until the overspray happened.
There's a chance that the original clear is getting thin as the clear...