I'm having a Westone Superheadless & Fretless get the CA treatment...This is done by a pro with a lot of experience in this field, I've played several fretless basses with a CA coated fretboard and it does feel different, sounds different and is very tough. Applying isn't the hardest work, you build up layers (up to ten) and then the real labour starts; sanding and polishing...
If you're interested I'll try to make some pic's, we are at layer #4 at the moment.