I can SO see the poor slobber covered kitty...Fat Cat is just trying to make sure that nobody ever slobbers all over HER, which I can totally sympathize with.
My aunt has always had both cats and dogs, and she uses a "toy" designation with them. Kittens and puppies are first taught STOP! followed by Get a Toy to distract them from misbehaving.
Chico (a shepherd-retriever mix) was responsible for the additional NOT A TOY command that she teaches her animals right after that--even her cats, though it takes them longer than the dogs, obviously.
Chico would chase down and/or bring back ANYTHING--the cats, the mostly dachshund (oh, don't think it didn't piss 7 year old Captain off to be picked up out of the grass by this puppy and brought back to the door in the middle of a poo!), us kids (I was 6, and remember being almost completely picked up off my feet to be brought from the gate to the door by my belt) the garbage cans, anything he could get between his teeth and a little leverage on. And he would pick on the cats, Cap and us kids, nipping, bowling us over with his nose, knocking us around with his paws, flopping down on top of us like the were throw pillows. He was just playing, but at 11 months old and 70 pounds, he was big enough that it wasn't funny!
Finally she got a wonderous idea from dealing with her 2 year old son, who was going thru his "mine" phase, and had to keep being told "That's not your toy! THIS is your toy!"
So she started working really hard at correcting Chico really hard every time he put his mouth on something he wasn't supposed to put it on, and saying "NOT A TOY" and then giving him his ball or a rope or something, saying calmly "Here's your Toy" while playing with him for a minute. It only took about 3 weeks to stop picking things up that he wasn't told to "get!" It took a couple of months of using the same command with his unacceptably aggressive play behaviors towards the other animals for him to learn that they were not toys, too.
She said it so much between saying it to the doy and saying it to her child, it was the first thing her bird learned to say

Which made it REALLY funny when she got Poquito; every time the poor puppy got within 2 feet of the bird cage, Popeye would screech out "Not a Toy! Not A Toy!"
Maybe you could try teaching Ranger that Tigger isn't a toy. Using that one phrase for all objectionable 'play' behaviors has worked really well for my aunt. Leave it alone is a notch up in her discipline scale--Leave It Alone means something is absolutely forbidden, and you will be IMMEDIATELY EXILED to the garage if you touch that thing. Not a Toy means you have to stop what you're doing, but can stay in the room and play as long as you play nicely.