Make a coil of copper tubing that will fit in a 5 gallon bucket.Fill the bucket with ice and water and put your separator on the tool side of the coil the cold coil condenses the water out.
Vinegar and molasses are both citric acid products just not as strong as citric acid and water.I forget if navel jelly is also citric acid or phosphoric acid.
Someone mentioned ospho( phosphoric acid).Good stuff and you don't have to prime over it if you use oil base paint.You don't have to do anything with it immediately because it protects the metal.Epoxy does not play with it though. Regular primer is porus as someone mentioned and it will rust under the primer if you don't paint it soon.
FWIW I'm using ospho and rustoleum every place that's not visible as rust prevention.Insides of doors backsides of body panels, etc. Cheap for the rust protection.