If there are fairly minor scratches need filling in you can use that plastic bumper repair stuff (or fibreglass equivalent depending on the material on your fairing).
The paint colours should be able to get the codes from your local suzuki dealer to paint over it again.
Large cracks never look good repaired, when i have done it anyway, so probably better off getting a new panel from a breakers yard.
Or just live with the character your bike now has.