I would advise against painting, very strongly. I wanted to improve visibility, and bought a set of prop guards, with the intention of painting them with a bright neon red fluorescent spray. The can specifically said that it could be applied to plastics, so I was optimistic. They recommended applying a white primer for best results, which I did. Neither paint stuck to the plastic, and ran, in spite of applying multiple very light coats. Experiment failed.
Wraps are an excellent way to go too. You can buy a pre-cut set that will cover pretty much the whole drone. On the other hand, you can buy wrap on a roll (about $10), and cut pieces to cover only parts of the drone, like bands, strips or circles. You can get colored chrome wrap - bought red and blue:
https://www.amazon.com/gp/product/B01GJXU1BE/ref=ppx_yo_dt_b_asin_title_o01_s01?ie=UTF8&th=1
https://www.amazon.com/gp/product/B01GJXU25E/ref=ppx_yo_dt_b_asin_title_o01_s01?ie=UTF8&psc=1
I started a thread over at DJI.com that may interest you:
Good Strobe for increased visibility?
It includes pictures.