A fellow Catholic today has informed me that, yes, Jesus did teach the Protestant concept of imputation, where by a filthy sinners is "imputed" with righteousness externally.
You are like whitewashed tombs, which look beautiful on the outside but
on the inside are full of dead men's bones and everything unclean.--Matthew 23:27
We see the Calvinists are not the only ones that prides themselves on artifical appearance of righteousness-- the Pharisees did too. This fits in line totally with the Calvinists that believe even a regenerate believer is STILL "totally depraved." Essentially, Calvinists believe God just white washes them, when under neath they are still filthy tombs. I'd imagine a good Calvinist commentator of this verse would say "well, whats wrong with that?"