Instructions for use: clean the rusty surface from traces of grease, oil, paint or dirt. Apply with a small brush, ideally a toothbrush. Leave to act from 2 minutes to 1 hour depending on the degree of oxidation. Rub off all rust and rinse with plenty of water. Let dry. The surface must be protected against new oxidation by means of an anti-corrosion protector. As a lime scale and rust stain remover: dilute 1/1 with water. Keep container tightly covered.