Blend-in for a metallic strap

My wife would like to have a smartwatch with a strap in rosé (pink) gold steel mesh (something like https://www.apfelkiste.ch/smart-watch-fitness-tracker-display-ecg-herzfrequenzmessung-frauen-milanaise-armband-rosegold.html)
of course with all the features and extensiblity of the bangle2 :-). A strap compatible with the bangle2 can be found but doesn't blend in well with the silicone/plastic look of the watch-case (even the pink version).

Thought about how to blend in the watch to the metallic look and thought about the following possiblities:

1. Spray-painting the watch with a metallic color (how well does it stick?)
   
2. ordering a custom milled casing with the right colored metal (has anyone a 3d-model of the current case?)
   
   

Does anyone has some experience with such a plan? Other ideas are welcome (except buy her an apple-watch).