The bars are improperly spaced. You will find screws and other tiny parts the bird will work loose and it can kill him. Birds chew constantly. They will chew at the bars. The paint must be non-toxic.
Birds are notorious for opening birdcage latches.
The latch must be of a good design and secure. Keeping a cage clean and sanitized is a very important issue. Some cages are impossible to keep clean, even harder yet to sanitize. The cage must be the proper size for the bird. The larger the better.