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Disodium EDTA, Baths in White Vinegar
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Once difference in CREST and lupus is of academic one, both CREST and LUPUS is due to a tiny pathogenic bug inside your body. While CREST is very much like a nanobacteria, lupus is much more closer to those of the mycoplasma, where it exists similarly closer to fungus and bacteria in its environment.
The reason why I know CREST is due to nanobacteria is the calcium deposits it creates in some specific conditions of CREST, called calcinosis. This is a big clue since nanobacteria tends create calcium as a protective shells leaving the deposits and destroying or hardening of tissues as a way to multiply.
You might ask how to kill the nanobacteria? A nanobacteria exists in greater numbers in presence of heavy metals, especially free radical heavy metals. An easy way to find out is to do a heavy metals testing using Dithizone system. Metals in high amounts have a tendency to cause the destruction of collagen through a maillard reaction in presence of something such as iron, for example as a catalyst to sugar and proteins. The best way out, if this is so is chelation, or oral disodium EDTA mixed in all your drinking water. So my own personal estimate, when the time I was tested for positive heavy metal copper in my urine, was about between 1/4-1/2 teaspoon of disodium EDTA to one liter of water. Taking plenty of chinese parsley will also help chelate out heavy metals. Eating granulated lecithin 2 tablespoon with every meal long with food will also reduce the buildup. Taking baths in white vinegar will also remove the calcium buildup, killing the nanobacteria. In this instance, nanobacteria that is, I think taking apple cider vinegar would help, with added baking soda perhaps to reduce the problems of CREST as acetates, chelation, and alkalzing do have a tendency to dissolve microscopic calcium shells that nanobacteria build up. Most importantly is to take magnesium chloride (or citrate) and zinc acetate (or chloride, or citrate form) to reduce the calcium buildup as magnesium is antagonistic to calcium and zinc to increase immune systems against the stealth nanobacteria. Alkalizing certainly helps such as taking 1/4 teaspoon baking soda 1/4 teaspoon citric acid with 1/2 glass water taken once before sleep and once in morning also. Licorice extract also helps in killing of the nanobacteria also.
This is what I would do different from lupus, but you can still use that, along with this added information to help with CREST.