Need help with touching up paint

Can anyone make suggestions of what type of paint I should use to touch up the white parts of the Target exclusive Universe Ultra Magnus?
Normail I've touched up color issues with Sharpie pens and this one I'm thinking a White Out pen may work, but wanted other options. The touch ups are small knicks, so not much paint needed.
Thanks for any suggestions
Normail I've touched up color issues with Sharpie pens and this one I'm thinking a White Out pen may work, but wanted other options. The touch ups are small knicks, so not much paint needed.
Thanks for any suggestions