My big Simon will use his sisel rope scratching board but not the carpeted one. He is good at not scratching the furniture but my little Chianti is a demo derby. She does not like scratching posts just the furniture. Oh, they both like the cardboard scratching box I got at Petsmart.

I think you are just going have to "cat proff" your furniture. I have throws over the arms of some couches and a towel over the back of my office chair. She likes to get on top of it and scratch away. My hubby even put clear packing tape on the back of one chair when she wouldn't leave it along. Looks kinda like Jeb Clampett's chair. LOL I've put a throw over the tape to hide it.

I have soft claws for her and she will let me glue them on and I also keep her claws short. I haven't put the soft paws on her in a long time. She seems to be getting better or we have just "cat proffed enough".

We have a suede love seat and both cats never bother it. I think I will go with suede for furniture in the future. Some fabric they so not like to scratch.

Also experment with clipping her claws. My Simon will fight me if I turn him on his back. He hates that. I've learned to let him sit on the counter when I clip his nails and then he is very good. I had one cat many years ago who only let me clip his nails when he was sound asleep. I tool the opportunity to clip them when he was out and it never bothered him. LOL You may have to do the same. See what works with him.

If you declaw he may just pee on your couch instead of claw. It does cause other problems and ones you do not want at all. You would rather have the clawing.