I'd recommend the DupliColor Engine paint & primer. I had great results with it just by simply RTFM'ing. The paint is good to 500 degrees and available everywhere. So far it's held up fine on the catch can & mount and brass Tee. I plan on painting my master cylinder red with it.
Most brake boosters are held in by 4 nuts (studs coming out of the back of the break booster) on the inside of the car behind the brake pedal. You should have it out in about an hour (this allows ample time to consume 2 beers in the process - necessary to perform contorted maneuvers required for this endeavor).
Could always paint it the car color, hot pink, whatever you like!
Post pics!!!