1. Using a PEN TOOL, select area u wish to brush.
2. Right click, make selection, Feather 1
3. Select the EYEDROPPER TOOL and choose the color you will brush with.
4. Select BRUSH TOOL, use the diametar of a tool to around 170 PX, and easily start brushing till you hit another hue (in this case, grayish blue)
5. Repeting first steps
6. And the rear bumber is finished.
7. Dariich's tip:
bla bla bla...
The main goal is to be detailed and duly.