How to stop furniture clawing for good?

Double sided tape stuck to his favorite spots may work. Cats hate the feel of it on their paws, and will go and scratch something else (like their scratching posts). Siamese are very needy cats - he may also be like that bad child who does anything for attention, even negative attention. Let's face it, he *does* get attention every time he scratches the furniture, right? Use a squirt bottle rather than shooing him away, and it won't be as much fun for him. Siamese are way too smart - and manipulative.