we had a new neighbour move in with two cats, they decided to use our garden as their toilet, and my convertible soft top as a scratching post leaving it ripped and torn, she was very nonchalant about it saying what do expect me to do? so we tried all the usual anti cat deterrents, spent a small fortune, then I bought a super soaker a water gun which could reach long distances, it took a few days of me being sat in the same position like a sniper, every time one of then was naughty they got soaked, and hated it, they soon learnt the places where they would get drenched in cold water! after that I only had to show them the gun and they would do a runner!