powder coating should work.
it doesnt matter. just going with the odds is all of him disliking the bike more than he dislikes the color. if you notice i sent him a link to spectrum for examples because yes, ultimately i dont give a sh!t what anybody spends their money on,It's only money. If it makes him like his bike more then what's it matter?
you can get anything you want. a basic powdercoat is almost 10% of your whole bike cost. but clearly you want to do it. i would recommend paint/ceramic | spectrum powderworksWhen they powder coat, can they put on any subtle graphics, or is it a solid color. do you have a pic of her?