I learned how to apply them during my apprenticeship and have
describe the method here previously. My teacher would thin his
Irabo glaze and apply the thinned glaze to the bottom half of the pot.
Then, he applied a thicker application to the top, but it was
thinner than your usual glaze. He almost always got perfect runs
stopping just before the foot.
Instead of thinning the glaze for the bottom of the pot,
I brush on the bottom part. Because the glaze moves, the brush marks