Painted bumper and ducts seperately because they contain alot of tight spaces so the ability to get below and around them and the bumper pockets makes the coating better, which on the front is really important due to the amount of debris, bugs, and road spray its going to have to endure. I just put a bead of two part epoxy on each, waited a few minutes and then clamped the ducts in in place, waiting around an hour for them to fully cure.
"I love deadlines- I like the whooshing sound they make as they fly by"