Join Date: Oct 2007
Location: corvallis, Oregon
Well, Alcy, the first thing you can do is try restaining. Although, after your vigorous buffing of the one end, I think that I would go over the entire surface LIGHTLY with ~150grit sandpaper, by hand, to re-open the pores evenly across the surface. (on a veneered piece as that, you cannot sand away the stain, as you suggested, because you WOULD sand through the veneer.) I say by hand because if you use a power sander, the friction will probably cause your sandpaper to gum up with the stain almost immediately.
Then maybe try starting the staining at the other end. Try to give the stain time to absorb.
You are correct in assuming that your finish will not 'hide' the stain job. It is a clear finish, and glossy at that, so it would likely highlight it.
As for veneering over the piece, I cannot say for sure. I don't know what the adhesion would be to a recently stained surface. I'm not experienced enough in that aspect.
By the way, I think the finish you're using(Mirror Coat) is a pour-on finish, right? I assume you know that you need to have edges up all around the border of your top or the finish will just flow right off onto the floor. It's self-leveling. Good luck, and keep us posted with the results.