Yes, Pets at Home sell a special liquid that I can't remember the name of, that really does completely neutralise cat urine smells. It costs about £7 for a large bottle. If you wet a feather filled pad though you will need to tumble dry it. Is that possible?
One of my cats has weed on the leather sofa, and it has soaked through the leather case into the cushion pad (feather filled). Does anyone have a clue as how to deal with both the leather cover and the cushion.