Battery terminals, connectors and similar items contain lead or its compounds. After working with them, be sure to wash your hands.
Prolonged and repeated contact with used engine oil can cause skin cancer. Avoid getting used oil directly on the skin. If this does happen, wash the affected area thoroughly with soap and water or hand cleanser as soon as possible. To facilitate the removal of oil from the skin, use barrier creams. Apply the cream before each stage of work. If possible, remove oil from parts before working on them.
Avoid skin contact with electrolytes, brake fluids, antifreeze, fuels or greases. If any of these substances are swallowed or comes into contact with the eyes, seek medical attention as soon as possible.
Contact of refrigerant with exposed skin or eyes can cause thermal burns (frostbite).