The iron-based anti-rust powder is effective in eliminating brake dust from wheels and rust marks from surfaces. Recommendations for use: 1. Shake the container thoroughly and apply it to the surface, allowing it to sit for 3-5 minutes. 2. Clean off with a high-pressure water spray or simply with water; For stubborn rust, you may want to gently scrub a small area with a sponge, then proceed to larger areas without harming the item. Note: This product is designed to tackle rust spots and dust, and its effectiveness may be limited on items that have already experienced significant wear.