For application to large objects, such as tanks and cabiners, the diluted mixture at room temperature is applied by sponge, brush, or cloth whereby the surface is thoroughly wiped with the cleaning solution. In cases of severely rusted surfaces, several applications may be required. After this, the work should be thoroughly rinsed with water. It is important that the parts not be allowed to stand for more than a few minutes after brush application of the Cleaner to a metal surface before rinsing is done. Long standing before rinsing and after application of the cleaner may cause glassy like phosphate coatings to form.
Suitable containers are chemical stoneware and lead, plastic or rubber lined steel tanks.
Stainless steel is usually satisfactory but pit corrosion may occur near welds. Heating coils should be made of lead, ventilation is recommended for the cleaning of aluminum and zinc base die-castings since there is an evolution of hydrogen gas causing an acid spray. There is only slight gassing when steel is cleaned and no gassing when copper base alloys are being treated. Phenolphthalein should be used as an indicator. In case of contact, flush skin or eyes with plenty of water for at least 15 minutes.