I know you said you dont want to paint the side of the car but years back i did work experience at a crash repairer place and im pretty sure they could sand off a certain section of paint (say around the scratched area) and fade new paint into it. This prevented you from doing the whole pillar, side, and possibly roof. Dont know if that made any sense lol but your best bet would be to have a chat with a few Spray painters i got a kit painted down at M&C Doyle crash and they did a brilliant job for a really good price they mite be worth a chat. Apart from that you could get touch up paint and go over it but it will most likely look crappy.