The explanations for this will not be obvious: the car was not the top performer in the scene. In the case where a component has multiple “top level” components, the render operate can return an array. These washes are completely different to regular acrylic paints as they are specially diluted with different mediums so that the paint can hold on to the floor tension in gaps and holes. A traditional paint, very diluted, just isn’t as simply applied as washes in these surfaces. So, it’s better to use a specific wash moderately than just dilluting regular paint. Drybrushing lays paint on the higher areas of the miniature, leaving the holes and deeps untouched. Just dip the brush into the wash, set it on the gaps you want to paint and let the pigment circulation from the brush into the spaces with gentle gradual movements. I assure you the paint pot isn’t including weight!