Using these HO brass skeleton log cars is easy. Just place them on your model train tracks and enjoy watching them roll. When handling the cars, be gentle as they are fragile items, especially the brass parts. To keep them in good condition, store them in a dry place away from direct sunlight to prevent further tarnishing. If you notice any dust, you can use a soft, dry cloth to gently wipe the cars. When it comes to shipping and returns, remember that for domestic USA purchases over $199, you get free shipping. For international orders, you'll be responsible for any import duties and tariffs. If you're not satisfied with your purchase, let us know within 30 days and we'll give you a refund, but you'll need to cover the return shipping cost unless the item arrived damaged.