I have saxophone withdrawal symptoms
For scratches, I used to always carry a couple of accessories with me: A cloth to cover my belt buckle and a towel to sit on letting it hanging where the sax made contact with the chair to avoid scratching the horn.I’m also scared of scratching my sax on the chair if the chair is not cushioned. Home chair is, concert band practice is not.
Then, you can also consider what I was suggested by a member here: Tesa tape that's felt you can easily add and remove where required. Sorry it's the French version of it, but I'm struggling to search outside of France from my phone!