Instead of grabbing a paint can try to remove the ugly scuffs from your white painted doors with common household items first.
Remove scuff marks from interior door panel.
First mix equal parts white vinegar and water.
This means that when rubbing with a slightly dampened lubricated eraser pad you are able to remove otherwise impossible scuffs from your door cards and dashboard.
Shoes can cause ugly scuff marks on doors.
To keep your vehicle looking clean and cared for you should use a cleaner that safely removes the scuff marks without scratching or otherwise damaging the plastic auto interior.
Use a small amount of rubbing alcohol or wd 40 on especially stubborn scuff marks but do so carefully as these could remove the paint from your door.
Spray the mixture onto the scuffed surface let it soak in for a moment then wipe it down with a magic eraser scrubbing pad.
Rub over the offending marks on your cars plastic or vinyl interior door trim until the marks have disappeared wipe a clean damp cloth over the cleaned area to remove any residue and then dry off.