[perezfan]

I would not mess with that pristine Stoneman flannel in any way... do not let an ink marker anywhere near that thing. Signing it can be messy if the pen gets caught up in the cloth. And the flannel is not really conducive to being signed... it's a lousy medium for ink.

I would leave it exactly as-is, and just enjoy it. If you feel you need Stoneman's auto, get it on a photo, and display it alongside the jersey. I agree with JimmyC, that it would be best displayed on a mannequin. That way, you can see front and back, and you'll get that coveted 3D effect. Don't degrade it by flattening it inside a frame. It's a tremendous find, and congrats on acquiring it!