Originally Posted by easterbran
Step 1-select this tool (you may need to right click to find it)
Step 2- click the + button to "add your selection" you can change the brush size (it is at 3 on my screen) if you need to
Step 3-select the whole wheel
Step 4-go back to the options and select the - button. "subtract" the areas you don't want to be colored
Step 5-click this (you may need to click a circle icon that is black and white)
Step 6- check this box and play with the bars!
Should be it!