My bumper got scratched in a collision. I'm wondering is anything bad would result from leaving it like this? I'm not sure what, since I don't think it's make of something that could rust.
It's all plastic. They're really the opposite of protection, more like a glass jaw, hanging out in the wind, waiting to get wacked... Anyway, someone nicked a similar area on ours recently, no where near as bad, likely in a parking spot. Up to you, but for the short term you might just try reducing the abrasions with a fine rubbing compound, and then applying touch-up paint to fill the deeper scratches. Then polish the whole area. The burnished look, LOL. Eventually you could get it pulled off and repainted professionally. Or they might just mask-off to do it. The pros can get it looking like new.