A quick scan examination of the information on the internet reveals that Rev. Newton became involved in the slave trade after he was pressed into service and traded, at sea, to a slaver. During his "employ" in Africa, he was essentially held in bondage himself--his "escape" being as a mate on a slaving ship. He commanded only two sailings, both after he had begun his religious studies--on the first, only six slaves died(and this was a time when even non-slave sailings often lost passengers and crew to disease), on the second, none, neither slaves nor crew, were lost.   

Though he experienced a religious epiphany, his religious development came from much study, in both secular and theological areas, over many years. He studied with the leading clerics of his day, including John Wesley--his writings were evangelical--he wrote extensively, using the baseness and depravity of his early life as as examples in the conversion of others.

Given the frankness of his writings, and his long service, more than forty years, as priest, curate, and rector, and as one of the leading evangelists of his day, and his later work as one of the leading voices for abolition, the idea that he wasn't "fully repentent" isn't born out by the evidence.

We move for dismissal.