Assuming that you have already found the perfect vogelkooi (bird cage), keep in mind that bar spacing or sizing are not the only aspects that really matter. Maintenance is very important as well. From this point of view, most experts warn bird owners about the harmful effects of painting a cage. You should consider this aspect when buying the cage too.
Harmful effects of painted bird cages
A lot of manufacturers or bird owners choose to paint the cage in order to match the theme of a room. But then, paint is deadly for birds. Would you sleep in a room that has been painted during the same day? Obviously, you would not because you risk dieing. At the same time, you never lick or chew painted walls either. However, birds do use their beaks in order to scrape or bite bars. When the cage is painted, all those toxins will go inside your bird. A bird is so sensitive that its health will be seriously altered.
With these thoughts in mind, never even think about buying a painted cage. Inspect it very carefully and if you feel suspicious, use your key to scratch it and convince yourself about it.