I use a squeezy bottle of water on marauding cats. More portable than a hose, and more robust than a water pistol.
Cha-Cha had his food and water in the living room with him overnight. Add to that, the litter tray I set up on newspaper, so that he didn't have to go up and down stairs (my living room is upstairs in what was a bedroom).
He climbed in the tray, turned 90 degrees....and pissed over the edge and down the wall. Mop up, turn tray round. Go to bed. An hour later there is more scraping, and an splendidly aromatic crap in the tray. Out of bed, remove crap, cat is on landing with clothes peg on his nose.
Take bag of waste material down to the kitchen, accompanied by cat, who wants to know why his food is not in the kitchen. Short attention span, this one. Back upstairs again, still with furry sock, who is no longer limping.
His meal-ticket should be back tomorrow or Sunday. Phew.