Wet the fabric you will be using. It should be thoroughly wet then wring it out enough that it doesn't drip and isn't soaking wet. Don't get it too dry or the capillary process won't work as well. So....somewhere between not dripping wet and not totally wrung out to the just damp stage.
Place the wet fabric in the plastic bag. Roll down the sides a bit to make it easy to get to the fabric. It should be placed loosely in the bag...not a tight little ball.
Pour out your paints on whatever palette you prefer. You can keep them separate or mix them. They will become a bit mixed anyway when you pound them.
Take your paint brush and wet it. Then moosh it into some of the paint. Then begin to literally pound it into the fabric. You will want to turn the fabric and be sure it gets to most or all of the surface. Keep in mind, this really is a wet process. You don't really want the straight undiluted paint on the fabric. The water is what creates the beautiful effects.
Loosely tie the top of the bag and place it in a warm place to dry out. I put mine in my supply/batching closet. This process can take several days. It is best if you just forget about it for several days. If it is very slow in drying out, you might want to loosen the tied top a good bit. It needs to get totally dry but not in a hurry. The magic happens during a slow, several days drying time.
Tune in tomorrow to see the results and an example of a piece used in an art quilt.
My friend, Wil, who showed me this technique is joining me to show you some of her results as well. I hope we can inspire you to recycle your paints and perhaps some leftover fabrics into a beautiful example of this surfacing technique!