Using your HO scale brass train model is easy. First, make sure you have an analog - DC power source. Connect the model to the power source, and then you can start it up and watch it run on your train track. When handling the model, be gentle as it's a delicate item. Avoid dropping or knocking it around to prevent any more nicks or chips. To maintain it, keep it in a dry and dust - free place. You can use a soft, dry cloth to gently clean the exterior from time to time. If you notice any excessive noise or performance issues, stop using it and check for loose parts. When storing, keep it in the original box or a suitable protective case. Also, be aware that if you're shipping it back for a return, you'll need to repack it carefully to avoid damage during transit, unless the item arrived damaged in the first place.