Here is a video regarding chemical etching of "Delrin". I intend to use this process to etch Delrin parts that I produce that need to be painted. It wouldn't cost much money to see if that process is effective on ABS or whatever plastic those panels are made of.
Hope this helps,
Tom
https://youtu.be/JTsVF9nF-3E?si=5ffOmYGgLR7YUdYf