I copied these over from JV's Centa upgrade post back in February of 2016.
This first shot shows the marks if you look hard.
This is a blow up of the hub, clearly has jaw marks. So this gives you some time frame on how long they've been using them with the jaw marks. It would appear that it's just a crap shoot if your seal happens to fall upon one of the more pronounced jaw marks.
The other option might be to have the hub turned down and then press a polished sleeve over it. This is how lots of hubs are repaired that cost too much to replace.
I'm sure that with the small amount that you'll be grinding off, you'll be in good shape.
