Be sure and let us know how it works out. And of course, we're open to any and all further questions you may have.
As for the stain/varnish, you could do that. Just be careful of any drips or such, as they will show up more so than with regular varnish. Use a natural bristle brush and apply just a thin coat at a time.
If it's not shiny enough but the color is right, you can use regular varnish of the desired sheen for the final coat. Of course, if you want it a little darker, you can could use the stain/varnish for further coats as well. It's all optional.
Be sure to sand and clean off the dust between coats, to remove the grit and dust particles that always seem to find their way to the wet varnish.