For DIY, the correct paint to match OE specs for most MkIV wheels (including LB) is either Wurth German Wheel Paint, or Einszett Silber. Both companies make the clear lacquer, along with primer, and Wurth formerly had a German Wheel Refinishing Kit available for about $65 (now hard to find). The paint is not cheap, but it's generally cheaper than paying a shop, especially if you have more than surface curb rash. You'll need paint, primer, lacquer, sanding pads, masking/painting tape, metal filler (where applicable) and either sand by hand or also by using power tools. You'll need all the little extras, degreaser, cleaners, cardboard, microfiber cloths, and a ventilated and appropriate place to paint. There's some good how-to's online. You can mask off the tire from the wheel in a pinch, but if you're going to pay for the right paint, you might as well do pay a little extra to do it "right," and remove the tire. The grease that lies between the tire and wheel at the bead can discolor and impact the paint along that area. In a pinch, you could put your spare on and do one at a time, but the painting will be impacted by temp, humidity, wind, and you may see differences between wheels painted under different conditions. Plus, it's all in the prep work, and it's easier to prep the wheels all at once, partially because you'll have everything ready at the same time.
https://www.autogeek.net/wurth-silver-paint.html
https://www.autogeek.net/1z-einszett-silver-wheel-paint.html