There is so much to say about these ceramic pieces... for now I will just say explain what I have done. The pottery is made with with Continental Clay's Grolleg Porcelain. My choice of porcelain allows me to refine the surfaces but also suits my throwing style.
After the pieces are bone dry, I soak them for a number of days in motor oil. After this stage, I allow the surface to dry for a number of days before applying the lacquer.
I am currently using a spray lacquer for the outside and pouring lacquer on the inside, but will be going to a two part epoxy once I have nailed the process as it is a bit more complicated but allows me a thicker and more durable finish.