C.S. Lewis stated that God loved him into a corner and saved him. I think this is a good literary picture of irresistible grace. I suppose Paul could have resisted Jesus meeting him on the Damascus
Road in AActs 9. In Acts 26:19, Paul states that he was not disobedient to the heavenly vision on the road to Damascus. So, that implies that it would have been possible for him to be disobedient. Paul could have looked up to heaven from the ground, blinded and said “i am not going to do what you have told me to do.” He could have done that, but it is fairly non-credible to believe that any human being would have responded that way to a heavenly interception from God himself. So, yes, I believe in irresistible grace with the Acfts 26:19 proviso.