OK, I must be the rebel here, but here is another thought. If you plan to frame it, I would suggest removing the white border completely, then frame just the tapestry. The white looks like muslin, anyway, and adds nothing to the piece. The mat and frame would replace the border, and set it off beautifully. Plus, it might make it a bit smaller, and you could have some color in the mat. If it was meant to be a quilt, I would still remove the white border, then add sashing strips that bring out some of the color of the tapestry, and maybe some additional borders, then quilt it with batting, outlining the shapes in the tapestry (not an overall pattern), then bind it, add a hanging sleeve to hang it. Just my opinion :)