To stop cats spraying your furniture with their own brand of 'polish', sprinkle a citrus oil around it, or use a citrus oil/perfumed polish. If you use a bleach based or disinfectant based cleaner to wash it off, the cat will only come back and do it again, because you have covered its smell with a stronger one, so obviously its smell needs to be stronger this time...... but they don't really like citrus smells so they avoid them. Sooner or later, the habit is learned and then you just have to stop them crapping in the pot plants.

LTS