I should mention that this previous prismacolor drawing on the stone didn't work as well as I had hoped. True confession: I didn't use the brand Prismacolor I used another colored pencil, Lyra Rembrandt. Big mistake. Andy said that Prismacolor brand has more wax content and acts as a better resist during the washout with water. The Lyra pencil lifted up during the washout.
I also remembered two other things I didn't do. During the first etch with gum Jack Damer patted it dry with a paper towel until the gum payer was quite thin. I left the gum on to dry without eliminating the excess. When I did the washout with water several areas of the image disappeared.
I will be graining stones this week and will try this test again following the steps and details more closely. This is the best way for me to learn. Trial and error.