Well I thought I'd give it a go with some Ronseal quick dry varnish, walnut colouring, and I got this result:
https://picasaweb.google.com/lh/photo/sa4uUxCiTRokIGXvTq4NQg?feat=directlink
The main panel, on the right hand side is the stain. The frame on the left is the same product, but...