Originally Posted by hpete
All the above is good advice, but urine is a salt not an acid. Once you get the paint job done if you'll rinse it from time to time with a mild acidic detergent it will last much longer.
My mistake, thank you for the correction.
Apparently the vegetarian diet has something to do with it.
Urine pH: Urine pH is typically acidic in dogs and cats and alkaline in horses and ruminants (cattle, deer, sheep, buffalo, ect).
Merck Veterinary Manual