Can you fix a scratch on an iPhone

iPhones have a coating on the entire unit. The best way to repair it is to fill in and build up the scratch, layer-by-layer, using a repair kit that addresses coated plastics. Since coatings refract light differently (tint), results will depend on the depth and width of the scratch and tint of the coating. Smoothing a scratched surface with a series of abrasives will strip all coatings. Since the touch system is covered by a clear flexible layer, which is then covered with the iPod coating/s, you will want to be particular with the repair system you use. Scratch Pro has a filler and it is about $20. I have listed a few good sources to help you out.