Plastic welding bumper? Respraying rub strip(s)

[Eeyore]

My bumper has a big split in it from when i drove up a pavement. I used a spare rubbish soldering iron to remelt the grille back onto its tabs. With this though im not sure how you would fix it. If you cable tie it that will be a good fix as it will be strong and pull it together and if you do it in some funky colours it might look alright. To get it back to looking original though then maybe push it back together and remelt the underside with a soldering iron. then im afraid it may be filler and respray time but i doubt it will ever look the same!