Here's day 2 of marbling. I added more alum to the water I soak the fabric in. I followed Pro Chem's directions and it seems to have worked better. I also used colored fabric instead of white. I think that made a difference in how they look. A couple of them were hand-dyed fabric and you can see the mottling coming through the paint. The 3 in the first photo, I have close-ups of. The 3 in the second photo I have all set to add a second layer of marbling. Jo Fitsell said she doesn't soak the fabric in alum for the second layer, but I have so much background fabric showing that I decided to soak them in alum just to be safe. I'll probably end up putting a second layer on the first 3 too.