You can try to polish the scratch away.
I have used a rotary polisher with clear coat polish by Meguiar's Ultimate Polish to remove/reduce scratches. A machine will be more aggressive than hand polishing and blend the surrounding areas together. (I have never had the feared "burning" of the paint from a rotary buffer on the MH.)
If that does not do the trick, increase the grit of the compound by using Ultimate rubbing compound then followed by the polish.
I have sprayed and hand applied clearcoat over scratches but that just introduces inconsistency between the old layers and the new application that is almost as bad as just leaving the scratch.
Yes, I have wet sanded with 1,000 grit, 1500 grit, and 2000 grit sandpaper to reduce the new ridges before compounding and buffing, but have never achieved perfection.
But....I am very definitely an amateur with hours of wasted experience......
Also...you will get more scratches over time, so the attempt to repair/reduce this one will be experience gained for the next.
1995 CC Magna #5280
C8.3L 300hp Cummins, 31,000lbs