It likely won't work very well. Using string is really not optimal for several reasons. Only a fraction of the dmt will cling to it, removing the dmt from the string is a bit of a PITA, and you can't really get all of the dmt off of/out of the string.
Defat is much simpler and less of a hassle, especially when you consider that the string method will not engage all of the dmt present, requiring multiple rounds (or defat in addition). I'd recommend sticking with a defat.
Edit: Don't defat, back salt or mini a/b. It's less wasteful/time intensive.
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The OHTIn New York, we wrote the legal number on our arms in marker...To call a lawyer if we were arrested.
In Istanbul, People wrote their blood types on their arms. I hear in Egypt, They just write Their names.
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