Resist is applied before you paint. You can use special rubber pens or oil-crayons. This pic shows the original photo we used as a guide. On the left is my interpretation on smooth paper and on the right is the same approach, colours, resists etc but used on rough but regularly textured paper.Paul had used rough paper and was demonstrating the effect shown in the top-right-hand quarter of this pic. I was so dismayed. I had set up my lesson on SMOOTH paper. I rushed back to my area and peeled a sheet of very textured paper off and carried on with two sheets at once.
This is the application of the same resists, paints and effort for each image. The first pic below is done on the rough textured paper and follows what was done in the class. There were fifteen of us and none of them were the same. The next pic is the "mistake one" done on the smooth paper. It was admired all round, and even by Paul. It does have a more dramatic look, and as many people commented a bit like batik. That was probably because I over-applied the resist but who cares. It was admired, even by the teacher!!!