Your doctors are following protocol with reference to your rashes. The prednisone and plaquenil are found to help the skin rashes on two levels:
The antimalarials (plaquenil) are all very useful in controlling skin rashes. But, they do tend to work slowly and need to be taken for a number of months before any significant effect is seen.
The steroids, can also be given intravenously if the skin lesions are very severe. Oral and intravenous steroids obviously have a number of side effects and are therefore usually reserved for skin problems that have not responded to topical treatments and the antimalarials.
Sometimes skin rashes cannot be controlled with the above treatments or they recur on steroid dose reduction. In these cases, other drugs such as azathioprine or cyclosporin can be used. These drugs are often given for other problems in lupus such as kidney disease but they can be given for the skin alone in difficult cases.
I know, since you work for the public, that saying that you might have to be patient and wait for these treatments to take affect is not what you want to hear right now. Perhaps someone else on this forum will have some ideas and examples to help you with camoflauge techniques (make-up or something) that might help you in the meantime.
I know that some of my friends with skin rashes and lesions have had success wearing the mineral make-up. Maybe you can look into it!
I wish you the best