Spray the rusting agent onto the prepared grate surface.
This process can be repeated several times if desired. The bluish liquid disappears after it is completely dry.
The desired rust effects are achieved after several hours, depending on the room temperature. Due to the slow oxidation, there are beautifully lively rust effects!
Warning: can cause skin irritation, should not get into the hands of children, wash hands carefully if the skin comes into contact with it