Re: And this happened
I would try rubbing the white streaks out using some of the over the counter scratch removers. I have removed paint scrapes from plastic bumpers that were painted the same color as the car and from body panels with good success.
Try rubbing the black plastic area with a Mr Clean Eraser, or covering with some of the Back to Black product. If there are any dings or slight dents, check with a Paintless Dent Repair (PDR) or similar business. They do wonders with dents, hail damage, etc.
If you try to put touch up paint on the sides, it is really going to look bad in my opinion. Most of that should rub out just looking at the picture.
2018 Equinox LT 1.5 Tubo; Confidence/Convenience Package FWD