If you have a metal balcony floor, you're right to be cautious about scratches from outdoor furniture. The potential for damage depends heavily on the furniture's foot material. Hard plastics, rough untreated metal, or gritty textures on furniture legs can indeed scuff and scratch a powder-coated or painted metal surface over time, especially when the furniture is moved.
However, many modern urban outdoor furniture designs feature feet with protective elements. Look for furniture with integrated soft plastic caps, rubberized feet, or glide pads. These materials create a protective barrier that distributes weight and prevents direct, abrasive contact with your balcony's surface.
To ensure complete protection, you can take proactive measures. Stick self-adhesive felt or rubber pads onto the bottom of existing furniture legs. For heavier pieces, use larger plastic or composite glides. Placing your furniture on an outdoor rug or a dedicated balcony tile system provides the best overall protection, completely shielding the metal floor from any potential scratches while adding to your decor. Regularly lifting—not dragging—furniture when rearranging is the simplest rule to prevent damage.