Ugh, I sympathize. I hope you get some good answers here. I cannot speak to furniture but as a former veterinary nurse I want to praise you for not declawing your cat. I can suggest that learning to cut your cat's claws will make them square and not damage the furniture as much.

Veterinarians in the United States hide how terrible the practice is (it is illegal in many countries). If people don't want an animal that claws the furniture, they should not buy a cat.

The procedure is a totally unnecessary surgery which removes the first knuckle of the cat's foot. So they walk in an awkward manner the rest of their life and end up with arthritis, balance and behavioral problems.

Scratching toys do not work. Cats want to mark furniture that they love, and that furniture most often belongs to family members they love. So unless you start to sit on the scratching posts on a regular basis, don't expect it to change.

"The procedure" meaning declawing the cat, not clipping the nails (which is good). Sorry if that was not clear. :)

I agree about the declawing. Our cats get their claws trimmed every few weeks with a spare pair of fingernail trimmers. Even the mean cat tolerates it because she knows there are treats waiting.

I clip my cat's claws. When I had an expensive couch we used Soft Paws on him. It requires upkeep but has none of the risks associated with declawing.

My current couch if fabric, cheap, and we don't care too much. I patch scratched areas with fabric that semi matches in a more bohemian hodge podge way. This fits my eclectic room, though.

The main thing is to cover up the white that the clawing has revealed. That's what really shows. If you just want to darken it, you could probably use coffee or tea or a furniture scratch cover (either in liquid or stick form). Tibet almond is one http://almondstickscratchremover.com/. The stain will sink into the raw scratch, but you can wipe it right off (TEST THIS FIRST) the finished leather. If you want to be more particular, find a matching marker at an art supply house and apply it to the scratch, wiping off the finished leather as you go. It won't be absolutely perfect, but once the scratch isn't bright and clean anymore, it won't be so obvious.

My mom has adopted several declawed cats and recently she rescued a kitten that was (obviously) claws and all...she was really worried about him with the other cats. We tried the 'Kitty Caps' and was *beyond* surprised how well they work and that the cat never acted like anything was different! I highly recommend them : http://www.softclaws.com/index.php?pet=cat

they were really easy to put on and they fall off as the nail grows (6-8 weeks) then you put another set on :)

We call that little kitten 'Manicure Man' now :)

Thank you @cosgrove as I also have numerous scratch marks on my beautiful brown leather couch from my cat!

I've found that giving them cardboard cat scratchers and climbing posts keeps them too occupied to scratch the furniture.

I have had all of my cats declawed (front only) and all were perfectly fine. My oldest cat died last Christmas at 14 years of age from a failing liver but never had a SINGLE problem with arthritis, behavior, etc. She never even acted like she realized there was a difference. My two current cats are both declawed and it does not slow them down one bit! I am a vegetarian and love animals so if I thought for even a second that declawing was cruel I wouldn't do it but based on my experience, it is JUST FINE! :)

p.s. All of my cats were declawed as kittens, I probably wouldn't feel the same way about declawing an adult cat who was used to having his/her claws. And definitely not an outdoor cat, mine all stay indoors.