Upvote:2
I'd say not, but this is just my opinion, and not because I've ever heard of Ex Opere Operato so I'll keep this short and hopefully someone adds a better answer. But Baptism leaves an indelible mark:
Incorporated into Christ by Baptism, the person baptized is configured to Christ. Baptism seals the Christian with the indelible spiritual mark (character) of his belonging to Christ. No sin can erase this mark, even if sin prevents Baptism from bearing the fruits of salvation. Given once for all, Baptism cannot be repeated.
Which is more like chiseling yours and your bride's initials into a post with a big heart around it.