Here is the before
Here it looks like flour is wiped down the front, Oh dear more strange patterns on the back. Now I only wore this T shirt rarely under things before so it can continue its life in that way now. I used the correct quantity of salt so maybe I just didn't stir it enough. I'm sure these dyes are better if you are just brightening to the original colour and not changing it completely. I think any future dye attempts will be done naturally.
I have a lacey effect jumper with a low neck I will probably wear it under that as the neck area at the front looks ok.
I found some good ideas at Burda Style, the flower mashing dye job below looks great.
I think that is the way to go next time, not trying to get it even, if I stencil it on or use an item such as a leaf or petal then I think the results will be more acceptable. So I have learned something, how not to do it.