Re: Orange peel
Maybe the repainted portion of the bumper had fillers applied to it to even out and prepare it for paint, leaving the rest of the bumber untouched. If I remember, some platic bumpers are textured, so if is scratched or damaged in some way and filler is applied, the texture will be filled in and upon sanding remove the textures. The fender flaring of our SUV is plastic and textured, it was also scratched. The whole thing was repainted, the color was a match to the original color, but since it needed filler and sanding, it ended up being just a bit shinier than the rest.