Cross-grain scratches are not an issue. All doors go through a final orbital sanding step, so any cross-grain marks are minimal, microscopic, and nearly invisible. That said, if you are ordering paint-grade doors, the primer and paint will cover anything even remotely noticeable. We have even tested deep scratches prior to priming, and the primer virtually eliminated those marks. All doors are sanded to the same standard as stain-grade products, so paint-grade doors receive the same level of preparation.