I would question the 'Does not require customer approval' statement. Although this may (generally) be true, there may be exceptions to that.
Eg. Parts are electroplated and are stored in WIP for a period of 45 days. Prior to shipment, dock audit detects that the surface roughness of the parts is unacceptable.
In consultation with the coating supplier, it is determined that parts need to be stripped and replated.
Strip method is to acid wash, followed by 'burn', followed by wash, followed by re-plate and reinspect.
Parts are SAE4130, hardened to HRc 38-44. There is a potential risk for the following failures:
i) Hydrogen embrittlement (yeah, I know, but they raised that one one me)
ii) Tempering of hardness to below the lower limit (hardness is an SC)
iii) Pitting of part surface, leading to stress risers (this one is a REAL stretch on the part of the design engineer, but I don't have the knowledge to refute it).
The reasons above (if nothing else) are sufficient cause to notify the customer of your 'rework' process, and obtain acquiesence, if not outright approval.
JMO