when i was bothered by the cat that spawned my using vinegar, i was protecting my boat from invading species of dock kat in sin diego. dang cat was trying to get into my boat-- i had to do something to keep him out--this was all i could think of ! he never came back-- was awesome!! gave me wide berth anytime he passed by ,also-lol !!You could just drink a six pack and mark your territory in the same manner as the cats do.
as for using a natural , even warmed, product, i think there might be some offense taken as it isnt nice to smell after a few hours. would definitely work, tho.....