you MAY need to pop off the door panel, i had to. take out the 1 screw that hold the triangle trim piece (if power) then the two nuts that are staring you in the face.
You can also paint all the way inside of the side mirrors if you take the mirrors off,i did it. Although you need a long skinny screwdriver and its a bit of a pain sorta.
I went one step farther this week when I repainted mine. I put cut the remote wires and wired in a 3 wire trailer plug. I did this so I will not have to take off the door panel when repainting the mirrors. Painted mirrors last so much better in the sun than the original black plastic. I used automotive universal flat black and then follow up with clear coat to give them extra protection and a shine. I wait a few weeks and then wax them like the rest of the car.