I should re-cover those chairs, if I were you; nothing would be easier.
Just before serving uncover the fish, pour a little white wine sauce on top, re-cover, and serve.
If your eiderdown is getting shabby, why not clean it and re-cover it yourself?
I will take my umbrella to the maker, who will re-cover it in good, durable silk, and I will bring the bill to you.
Then there is nothing for it but to provide new boards or patch up and re-cover the old ones.