I like natural sponge and steel wool. Between the two can make most textures
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And then after you can use the steel wool to take edges down
I picked up some natural sponges on my last run, butt I didn't feel they would do good with the mustard. Didn't think about unravelling some steel wool and making some looser shape out of it. I have a feeling it and the sponge would be like the crumbled tin foil. The mustard is sort of dense so it fills the voids of some pattern tools a little too much, which cancels out any patterning.