Of course they look bad! The colors jump around because, as I have written, only 7 recolored frames are used to recolor 237 ones… so, taking this in account, result is not that bad at all. Never say it’s perfect, and it never will, because I use an automatic colorizer software. And I’m not technically savvy to recolor a frame by hand, nor I have the time and patience to do that (if I was able to) to do that… recolor by hand literally thousand frames for just a few second long scene will take months, full time, years maybe part time. And, with my luck, the day before I’ll finish, the original colored scene will show up somehow, granted! 😄
Of course, again, if someone could, and would, recolor the b&w scenes, by hand, by an automated software, by black magic, he/she is welcome!