Aww yer killin me MarfMaster! Congrats on getting Campbell. As far as sealing the signature, you can't without ruining you base and potentially the autograph. Leave it exactly how it is. If you ever hae to pack the PF up, wrap the base in tissue paper. That'll protect it during shipping/ storage.
Hmmmm...You think a couple of light coats of flat clear could damage the signature and base? I wouldn't think it would but then again I've never done it to my statues.
Ohh I would go crazy in the merchandise sale. My wallet would burst into flames.
My girl would get upset and burst into flames if I went crazy in the merchansie section!