Put the painters tape on the parts of the hat that you don't want to get the paint on. make it form a line down the center of the hat.
Take your bleach pen and scrub it into the middle line of where you want to paint to go. This will fade the black color so the paint will show up more. Wait for the bleach to soak in. Then wipe it off with a white rag in some water.
When you get the black faded to a grayish color, you are ready to paint.
Use a big brush to paint with, then put on a thick layer of yellow paint. use a little brush to make some touch ups later.
Wait for it to completely dry and remove the painters tape.
Now you are ready to take on gym leaders with you new trainer Gold hat!