Galvanized can't only be bad if you breath it in, it can be obsorbed threw your skin. And yes milk it the way to go. I weld everyday if I get flashed I just used eye drops and take some ib profin and I'm good to go.I dont really get flashburn. but chilled cucumber slices work just something cold.
also if you weld on galvinized metal and breath the smoke its really bad on your stomach I hear. Not sure how it gets in your stomach but they say to drink milk.