Using these Walthers track bumpers is a breeze. First, decide where you want to place them on your HO scale model train layout, like at the end of industrial spurs or yard tracks. They fit well with WalthersTrack Code 83 or 100 and most other HO track brands, but remember the track is sold separately. When installing, just make sure they are properly aligned with the track. As for maintenance, a gentle wipe with a soft cloth every now and then will keep them looking good. Keep them away from sharp objects to avoid scratches. These bumpers are designed to last, so with a bit of care, they'll serve your model train layout for a long time.