How to finish a table by applying Rubio Monocoat. In this video, I’ll show you how to apply two coats of Rubio monocoat. I discussed this technique with other makers as well as Rubio themselves. Rubio says most woods only need one coat, however, you can apply a second coat to species like walnut. There are some tips and tricks you need to know to avoid some potential problems though. Since this is designed to be a one-coat finish.