Next step was to give the mat a good spray of water on the front and back. Here's the front....
Since I want this piece to resemble an antique I don't want a whipped edge as that would make it look too modern. As would wool or cotton rug binding not look authentic. So will fold over the foundation and tack it down. After all it isn't going on the floor so won't get lots of use. Am sure it will go on a wall or put on a table somewhere here.