It was cut and scored with precision but now you see the problem. All the cut and score lines are white!
As I have used rather thin paper (160gsm, apx 0,25mm thin) the white lines are not showing up too strong, but the stronger paper or card stock you use, the more the white edges will pop out like bright lines between the nice texturing and disrupting the effect of a cohesive surface.
One way to reduce the amount of white lines is to score the fold lines with a blunt object, like the empty pen I have used. That way you do not cut the fold line but rather press and indent it. So when you bend the fold line the texturing stays intact.
Still the cut lines will show as white.
So to fix the remaining white lines, you color them! Use anything from drawing pencils, pastels or felt pens. I have a range of felt pens and choose a color that fits bets. In this case I went for brown. But even a neutral gray will look better than white.
I encourage you to try this method on your next project and enjoy a much better looking model!