>>1557318No. If you use whatever acrylic on metal without a primer it'll all just come off. There are some specialized acrylics for metal, but they're not worth it. Best would be disassembly and spray paint, but that's a lot of work. The 1st suggestion is fine
>>1557301 Hit an art store and buy a tiny bottle of black oil paint and a pack of small brushes. Practice a little on something random to see how it works. Don't get it on your screen