Furthermore... powder coating is much thinner than paint. And practically impossible to retouch inconspicuously.
I have to intervene here :)
Since I have developed powder coatings for over a decade, I can correct some things here – or at least share my experience.
According to my experience, classic powder coatings have a significantly higher layer thickness than wet paints. For a proper powder coating, in my opinion, a more complex plant technology is required, because it is applied electrostatically to the workpiece and also has to be baked at a sufficient object temperature. Of course, wet paints can also be processed elaborately, but that is not a "must." Problematic can be many thin cross-connections, such as on certain fences or Alessandro’s railing, which are not well coated due to electrostatics because the powder is not picked up by the workpiece here (keyword: Faraday cage). Powder coating also adheres significantly better to the substrate with proper processing than wet paint. For railings, if it is to be a powder coating, I would choose a fine-structure coating, which also conceals optical imperfections well. :)
However, development in powder coatings has not stood still, so there are also wet powder coatings (slurries), in which the powder coating is dispersed, e.g., in water. The advantage is – especially for larger surfaces – better flow, since classic powder coatings tend to develop a so-called orange peel effect.
*smartass mode off*