We are transitioning LO1 to a toddler bed and using his crib for LO2. There are a few bite marks on one of the railings where the white paint has come off.

I have some non-toxic/no VOC/ baby safe paint to touch it up BUT I need your help as I am not much of a furniture painter or DIYer!

Do I need to sand around the little patch of bite marks or the whole rail, or not at all? Any other tips or ideas for the best way to do this? Thanks!!

...oh and I can provide a picture of the area that needs to be fixed once DS wakes up, if needed!