What's the best product to use? Mohawk sells pre-tinted grain filler in
Walnut and Mahogany. Of course there is untinted which I have to tint
myself, apparently using regular wood stain. What about this Crystalac
waterborne clear filler? Anyone use that, and if so what were the results?

The application is an antique radio that has been stripped, and has a pretty
open grain wood. I'm looking for a smooth "piano finish" and will be using
Mohawk lacquer for the the finishing coats. I'll probably stain first.

Thanks,
Jeff