Some years ago, I was a supervisor in a completions organization and a very close friend was a QA Inspector. We had recently hired two younger guys that were just starting their careers, and therefore their tool collection.
The inspector and I quickly found that we could tell which part of an installation was being carried out by the new guys by the marks left on the hardware from their "less costly" wrenches and sockets.
The fix for this was to let them use our tools as they slowly built up their own kits with higher quality items. (We never found any marked up hardware again)
Rigidhead