I've just installed a matte black faucet and would like the drain and overflow covers, which are currently chrome, to match. (See first picture.) The fittings are plastic. They should be easy enough to paint, but I'd like to make sure they'll look nice and match the faucet because it won't be easy to find a replacement drain cover if I mess it up.
I've found some online instructions for painting chromed metal bathroom parts (here and here), and there are special paints/kits for painting chromed plastic on cars (e.g. PlastiDip), but I suspect that's overkill.
Can I just spray these parts with matte black paint? Do I need to sand and prime them first, as with chromed metal?
PS - If you're wondering why I don't just buy matte black parts:
I can buy a matte black overflow cover, but can't find a matte black drain cover that works with the installed assembly. The drain is from Ikea and designed to be "shallow" (i.e. immediate 90 degree bend to horizontal) in order to accommodate large drawers in a floating vanity. (See second picture.) The matte black drain covers I'm finding come as part of vertical drain assemblies and won't fit the Ikea drain/threadings.