CORROSION PREVENTIVE COMPOSITIONS; THE COMPOSITIONS ARE FURNISHED IN A LIQUID FORM AND ARE APPLIED EITHER AS FURNISHED OR UPON DILUTION WITH A SUITABLE THINNER SUCH AS KEROSENE OR THE LIKE; UPON EVAPORATION THEY FORM A METAL PROTECTIVE COATING, WHICH CAN BE WIPED OFF WITH A RAG OR DISSOLVED OFF WITH A SOLVENT OR DEGREASER WHEN REQUIRED