I don't think it would be any trick at all to remove OSR-damage from a double if such lines are barely visible.

As far as restriking barrels is concerned, more to the point tho is what has been brought to my attention in the past; many British doubles are or have been refinished over and over again. Restriking barrels can certainly over time reduce barrel wall thickness and might in fact be the "cause" of OSR in many guns!!

Possibly some think in terms of rebluing a rifle and what might be a minimal surface cleanup on the wheel but those of us that use the file know what it can do. Heck, I make knives with them...I reckon repeated use on thin-tubed gun barrels ain't gonna do them one bit of good for holding pressures...!

The use of the file to eliminate pits and whatnot might very well over time set a barrel up for failure.