I keep a Mr Clean Magic Eraser in my B&R Baseline luggage for if/when I happen to notice any marks. They come right off. Only had marks once from it falling on a dirty street while loading in a taxi. Otherwise, just wipe it down occasionally. I also soak all my luggage in permethrin to help prevent bugs from hopping a ride while traveling in the trunks of taxis, baggage holding areas and hotels just in case.