Ok, after learning how to do it, I gave it a try. This is reverse Tie Dye in the previous posts. I printed a Mickey Head out on printer paper... then I used some packing tape, looped underneath, to keep the Mickey in place. I put 4 rubber bands, one in each corner of the shirt, tie dye style. Spritz with 1/2 water and 1/2 bleach.
This shirt was black, and I could watch it turn a rusty color before my eyes. I DID do it outside, and I moved it in the sun for about 10 seconds. I already had the washing machine ready and with water and detergent added. Removed the bands and washed.
This was soooooooooooo super simple.
(This was an old shirt that I had paint splattered on it... so if you see a white spot in the Mickey Head... that is paint, not from the bleaching effect.