Double-click over your layer, then it will open a window, then go to Color Overlay and choose the color you want.
About the white part, I think you're talking about the stroke, so at the same window go the the last one that is Stroke and voila!
In other words, does anyone have that 3DS scene of the BF1 and is willing to take some time for me ? Also, is it possible to put an helmet on a tyre or next to the car ?
If someone is willing to help, I will send the skins