First of all, the use of vinegar to remove rust, vinegar has the effect of removing rust, you can first wash with vinegar and then wipe clean, and then in the corn processing machinery on top of the mineral oil can be applied.
The second is the use of baking soda as well as rice water, will have rusted parts put in, stirring for a while, wait until the rust are floating up when wipe clean, also need to be coated with mineral oil.