Think Dabs is absolutely right, however your OH must be prepared for a long haul cos cats have very long memories and my Misa is scared of certain things that remind him of his bad past and he runs for his life.
He had been with me quite a while and then I put on a hat and he truely scared me cos he sat back , bared his teeth, growled. flattened his ears and prepared to attack.
Sasa who I have had for over 3 years, I still cant touch although she will occasionally eat treats from my hand but if I make any move towards her she will run and its back to square one.