Damascus Oil Stains

[Troylet]

Can anyone tell me what exactly is an "Oil Stain" on a damascus blade?
I see knives for sale with this disclaimer and can find no info on the net.
Exactly when do these occur?
Are these a result of quenching in an improper medium (i.e. used motor oil that's way too dirty) or is this a result of improper storage?
Could these actually be misidentified rust stains?
Any help would be greatly appreciated!!!
Thanks!!!

 

[Bill DeShivs]

An oil stain would properly be dried up oil.
That said, if you are talking about cheap damascus, it could be anything.
If it is quenched in motor oil-clean or dirty, it will be substandard. Motor oil is not a proper quenchant.
Yes, it could be rust stains.

 

[Troylet]

Thanks Bill..!!!
So I gather then, that oil stains are not some inherent danger in the damascus process, such as cracks or delams or the like?
That clears up my concern and confusion!!!
I appreciate the information and your time!!!
Thanks again!!!