I remember reading somewhere that rust is the by product of oxygen and hydrogen, making water, making water vapour, and, being snuggled into joints that make the metal 'rust.' this is because the 'water' is saturating the metal and taking some of the necessary chemicals or particles out away from the areas they are in, of course. So, how do we reverse this rusting occurrence? if we were to observe that water takes away from this material, then honestly we could restore it with some sand, as that has 'quarts' in it. think, now, if you were to rub a metal rod with sandpaper it would rub all the rust off and some of the sand paper would be left on the rod, yes? so, it is logical to follow that if you were to rub the metal with sandpaper, the sand would be deposited onto the metals, of course. Now, if that is true, and, we could make a more 'metal paper,' like lithium coatings, we could easily see that, as it is not too hot at merely fifty degrees, we could restore the metal with a liquid metal, of course. Or, we could observe that grease is 'a natural by product of metals in motion?' this would mean that grease mixed with sandpaper, or 'greasy sandpaper,' would be a good substance to rub the metal down with. this 'rock,' in the form of sand, would be rubbed off onto the pipes or whatever and then some of it would stick and some of it would leave, by way of attrition.
Rust is merely the oxidizing of metals. If you rub metal with sandpaper, it takes the rust away, but it leaves a gap where the metal used to be. Grease is a good thing to put on metal BEFORE it rusts, because it prevents oxygen from getting to the metal. Paint does the same thing.
Upon reflection, maybe it is best to 'restore metals' by using 'metal magnetically charged shards,' to fill the holes? This could be where the shards, made of iron or something, would be able to fill the holes left by rust, or, restore the whole metal body. Maybe we could use iron in blood, which has a low boiling temperature, to treat damaged metals? this could be where the blood of snails, for example, are smeared onto the metals - hey hold on a second! Snail gel is used to restore wrinkles and blemishes on the skin. if we were to rub snail gel, coated with paint to keep it in place, onto the areas of rust, or, better yet, rub snail gel onto the actual rust, it will remove the rust. that, or a predators blood or saliva, yes?
An ounce of prevention is worth a pound of cure. Preventing the rust is far easier than it is to repair the damage. Entropy here is a factor. The best example I can think of is the dropped plate. Drop a glass plate onto the floor and it shatters into a dozen pieces. We'll even pretend that we didn't get the tiny shards that fly off...we're dealing with 12 pieces of glass that if you reassemble...will fit together perfectly. There are two ways the plate can be repaired. You can melt it down and remold it into a new plate. But that is going to take far more energy to do than it took to break it in the first place. You need to melt the plate fragments into a liquid state which means that you need to heat it to just over 1050 degrees F (560C) and that's going to take a lot of energy to get it to that temp. Then there's the energy needed to take it to the mold, and the energy needed to run the mold, then the energy needed to run the annealer (the process that allows the glass to cool gradually to prevent shattering). The other way involves using glue. But it's not going to be as strong or as nice looking as it did when it started. And you have to do the manual labor to reassemble the pieces, to apply the glue, to provide the clamping pressure to ensure a tight bond...and the chemical energy in the glue itself. Far less energy than remaking the glass plate...but still way more than it took to break it. Rust repair in metals usually involves a welder of some sort. The oxidized metal needs to be cleaned out and you can fill the gap with an arc welder, then sand it smooth. Which again uses more energy than the oxidation process took in the first place. It is far easier then to apply a rust preventative product to the iron/steel before it has a chance to rust. This is why my Aunt Paula's 1960 Corvette is still in excellent condition. It was her first car and she bought it new and took care of it. Took care of the paint, kept the underbody clean and applied underbody protective coating, had any paint chips taken care of as soon as they were noticed, kept up with the engine maintenance... All of that being the reason that car is approaching it's 6th decade and it still looks and runs just as well as it did when it rolled off of the factory line. As for using blood...an average person with 5.5 liters of blood has about 2.75 grams of iron in the blood as part of the hemoglobin (50mg per 100cc). If you had a steel structure that had lost 1kg, you would need 2000 liters of blood or about 363.6 human bodies worth of blood. Or you could just get some steel plate and a welder and do it with a whole lot less mess.
