I am confident that the bumper won't loose paint as it has been hit from the other side once before and bend came out nicely when heated. I think its a genuinish bumper so it has alot of flexibility. I have the same guess about the light but i am really worried about the fender dent.
Did you solve for AC problem ? I think its definitely related to your blower switch. I had similar problem with my blower switch but only when i would set the fan to the lowest , it would shut off randomly and offcourse the ac clutch disengages with the blower going off. My AC no longer works on the first notch which is really annoyng as it gets quite chilly with blower on second notch.
Lemme know if you find out about the light. I'll check this light wala i know after work tom. It would be nice to have an idea . !