R.P.M. is a new generation, water based, biodegradable rust inhibitor;this formula is designed to protect steel and iron from flash rust between operations and in short term 30 day indoor rust prevention applications;the R.P.M. rust inhibiting film which prevents oxidation is minimal and does not require cleaning prior to painting or plating of protected work pieces. R.P.M. leaves a microscopic film which prevents oxidation,soil redeposition and does not require an additional rinse before use.