Pets are great - they add to your family, they don't judge you, they provide unconditional love, they scratch up your leather sofas . . . . . So, my cat Buddy, and another Cat George before him, decided that when they were young kittens, jumping on and off my leather sofa was a big time. Unfortunately they left their mark behind. Evidence below: Hideous, right? After a while I started not to notice, but one day I realized how awful it looked and went online and typed in "cover up cat…