>>342060If he always does it in the same spot, try taping some tin foil on it. Cats generally hate scratching tin foil. That way he won't get away with scratching when you aren't there to notice it. In general it's best for a cat to associate consequences to an action rather to a person. He knows now he can't scratch the chair when you are there but he can get away with it if you don't notice. So whatever you come up with, it has to work while you are away.