Brand New Mustang Has Surface Scratch

The scratch is long (~2.5 feet) but very thin, and is not deep enough to catch my fingernail or even to feel. I'd like to get rid of it while doing as little additional damage to the clearcoat as possible. I'd also prefer to not spend $100+ for an electric polisher if that can be avoided.

Would appreciate specific product recommendations, as the more research I do the more confused I get. So far my "short list" is:

Meguiar's ScratchX

Thanks in advance for any help/info.