[SuziQ]

We've wanted to get it restored for a long time but are afraid it would be ruined.

I think wneighbor's tea stain idea might work. The brown threads may not pick up the stain, but it will make the lighter areas get more brown and possibly more uniform. Do you have anything smaller that is similar on which you could experiment?

[Wneighbor]

I really like tea-staining things. Can you tell? Since I have a lot of antiques anyway I even tea stain new stuff to go with the old stuff! LOL