The Spaniard
Professional
You could also get some 3D printed buttons for the case. Make them in any colour you want.I went on a paint shop and there that ladies sellers give me a paint catalogue and they tell me to grab a primer too, after i've chosed the color of the paint (200ml) and after that i went on that car painting who my childhood friend recommended to go for printing that case to let there materials i've got with me (paint 200ml , primer, b case + lcd case - if you can paint the A board volume buttons too - i forgot to do that). If you can , you can go on a car painting and you'll make it to look awesome. Hope it helps you