I'm exploring water etching by painting designs on bone dry clay with amber shellac. I paint on 2 coats (wait 30 minutes between coats) and then wait overnight before I begin the water etching process.
My problem is before I've removed enough clay (cone 5, B-Mix) the shellac starts to peal up around the edges and I am forced to wait for everything to dry then add another (third coat) of shellac and wait another 24 hours. I've been using a small sponge that is semi wet.
What (if anything) am I doing wrong? I've heard this can be a finicky process (which is why I have always carved my pieces instead). Thanks!