answer:It depends on the formulation of the glaze and the thickness of the coats. If it’s a glaze with a high alumina content that stays put, then you should be fine; a runnier glaze will run even more in thick coats. The total thickness of your three coats will depend on several factors: how thin the liquid glaze was, how long the bisque was immersed in the glaze (if you dipped it), and how long you allowed the piece to dry between dips (the moister the piece, the less glaze it will pick up). You can gauge the final thickness by scratching through the glaze down to the bisque in an inconspicuous spot (you’ll be able to patch it with a dab of glaze later). Depending on the glaze formulation, you’ll want 1/16 – 1/8 total thickness. A few glazes, like oil spot glazes, can be even thicker, but even they will droop a bit during firing. One last thing: If most of the thickness is concentrated toward the top of the piece, it will be able to handle a good bit of glaze running without gluing to the kiln shelf. But if you have a lot of thickness toward the bottom, it has nowhere to go if it runs. If you decide that your glaze is too thick, you can always wash it off the bisque, let the bisque dry completely, and start over.