Who is the build for? You or a certain audience? I have done both on my cars over the years. The powder coat certainly has some advantages, but it doesn't quite look the same as paint. But then, it is difficult to get today's paint to not gloss too much for an OE look. As we add flattening agent (which is white) the black gets less black. But either way, although not 'correct', very few individuals would know the difference given it's location.