Painting disks?

Is it legal? Like a light spray and then a clear spray seal? If it’s not legal that’s fine too, I’ll probably paint a few anyway. I think I read that as long as everyone involved Is ok with it and it doesn’t change the weight it’s ok?
If this will be true then i will repaint 9 ( NINE disk ) ( it has been loosing its colour , lately )
I am not entirely sure but any foreign substance can not be used on parts or launchers. If you do it is considered an illegal customization and is unusable in tournaments.
No, if you paint your disc or any part it will be considered illegal.