Just tell the folks it’s beets and move on. After this the cat will be in hiding throughout their visit anyway. 
Try vinegar, or seltzer water. 
Just tell your guests that the cat is entering a twelve step program, and offer no further explanation.
Did you get the stains out? Or does poor Tuna now look like this?
I guess all jokes with the punchline “a sun-burnt nun” are out of the question for a few days too…
Hoo boy. Nothing like a little hysterical drama to get the holiday weekend started.
I’d like to thank everyone for their suggestions - this board just paid for itself for the next five years.
And the winner was…Elenfair’s “white on white” solution. It just about got rid of it completely - huzzah! I owe you one.
The In-Laws said not one word about it. Little did they know what I (and Tuna) went through in the 24 hours before their arrival.
So here’s some pics, just to put things in perspective:
Go here and you’ll see:
“Pre-Accident”: An older picture before the madness
“Post-Accident”: After trying soap, shampoo, dishwashing detergent, Goop, carpet stain remover, and vinegar.
“Final”: After using the “white on white” solution.
Lesson learned: be aware of attacking kitties while drinking red wine.