it depends on the size of the scratches.
I fixed a front 1/4 panel on a carbon blue GT that was scratched by a snow shovel last year using the Maguiers three step paint products (Cleaner, LOTS of polish and caranuba wax) and some thinned touch up paint (VERY small amounts of thinner)
I put the thinned paint into the sratch and then wiped away the excess and it looks as though nothing happened!
If you thin the paint, use a VERY small amount of paint because you don't want it to run. Apply the paint with a brush (don't contaiminant the original bottle with paint) and wipe it off after a few seconds.
If the scratches are real deep, you might want to get it done by a professional