Continuity problems in my Film Trailer

One of the things a professional said about my trailer was due to the filming on different days, the sky is dark and cloudy one minute, and then bright blue the next minute. As this was in the same scene It needed to be corrected. I waited until a sunny spell came to film the shot again, but I was still unhappy due to the mise en scene being different from the other shots. I decided to edit on Photoshop to see what I could come up with to help me solve this problem. I then used the black and white effect on one of the clips. I felt this complemented the fact that the boys are trying to become cool and to stop being nerdy. I felt it had a good impact due to binary opposite from Claude Levi-Straus' theory becoming more obvious. This is because the shots are normal up until they decide to become cool and then when they do, it turns black and white and is heavily edited. I preferred this to the re-filmed shot due to the binary opposite and this will defiantly be in my final cut.