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There is almost certainly some amount of lead in the brass, but the amount that would end up in the the print, and the amount that would end up in the surface is so small as to be undetectable. The other things.. yeah.. not sure the stuff in the plastic is going to all be great. Contact time won't be much so it doesn't seem likely to be a major concern, but worth considering. The strength of the alcohol and potentially the acidity of the mixers may play an important roll.