I have quite successfully used a flour and water paste--with a little salt
added--to do a faux batik resist on cloth. I mix the paste to the
consistency of a custard sauce and use plastic mustard and ketchup bottles
from the Dollar Store to apply it. First I have the students draw their
design on fabric with a light colored washable marker...peach works great.
They then outline their drawings--adding patterns, textures, etc.--with the
flour and salt paste. When it dries they paint them with either acrylic or
block tempera, both with great results. When all is dry they peel off the
dried paste and if necessary rinse their work in cold water to remove any
stubborn paste.