bro, do know that no matter how you touch up, it will never be the same as respraying, if not touch up properly, will make it more worse than the scratch.
you can,
1) respray(definitely higher cost)
2) touch up paint/pen(but exercise due care)
3) leave it if your heart can bear with it.
& TCM = Traditional Chinese Medicine,
haha, its Tan Chong Motor.