1.SPRAY PAINTING: Brush painting and dipping are acceptable for the using of this product.
2. SLIGHT RUST: Spray it on the metal surface and then brush it, clean it with clean water about 10-15 minutes.
3. MODERATE RUST: Spray it on the metal surface, prolong the time that the liquid stay on the metal surface, then wiping or de-rusting it again are also acceptable, it would be better if cleaned with clean water.
4. SERIOUS RUST: Dipping in the de-rust lubricating till the layer of rust is cleared away. Better effect will be obtained if the gusher of de-rust lubricating is heated up to 150℉.