The Honda CR-V is an SUV with a front bumper that is made with a black or grey plastic material. Though this bumper material can't have the paint scraped off when scratched, it can become scuffed from other vehicles or objects that rub on it. The plastic material on the bumper can be sanded and painted, but it won't look like the original bumper. To maintain the factory look, you can remove a scuff on the bumper.
Use 600 grit sandpaper to carefully sand the scuff mark. Sand along the scuff, but don't put too much direct pressure on it so a groove isn't sanded into the bumper. Use just enough pressure to remove the scuff.
Go over the scuff again using 800 grit sandpaper. This removes any remaining marks and smoothes the deeper scratches made by the 600 sandpaper.
Rub a red scuff pad over the area to smooth any last scratches and to remove any bits of plastic material that may be sticking up from sanding process. The scuff pad has some sanding qualities, but is less rough than the sandpaper.
Don't use a low grade sandpaper or it will leave scratches than can't be taken out without using body filler to repair.