I though at first you might be correct. In Galations 6:11-17 Paul is arguing against those who would be circumcised to " avoid being persecuted for the cross of Christ." But if you look in the Greek text for this verse, you find the word used for mark is stigma. Here is the definition for stigma:
1) a mark pricked in or branded upon the body. To ancient oriental usage, slaves and soldiers bore the name or the stamp of their master or commander branded or pricked (cut) into their bodies to indicate what master or general they belonged to, and there were even some devotee's who stamped themselves in this way with the token of their gods
stigma:
Luow-Nida =
scar, mark (of a slave)
Liddell-Scott =
st°gma st°zw the mark of a pointed instrument, a tattoo-mark, brand, Hdt., Ntest.
Beatings were often done with chords tipped with metal which made whelps and punctures of the skin. The greek term describes well the marks of a scouraging. And Paul proclaimed himself a slave of Jesus Christ.
There is no contextual support for miraculous scars. And Paul's own account of his beatings and claim to be a slave of Jesus Christ make the term very accurate without imagining these marks to be "stigmata" in the sense the term is used in this article.