Just be careful when using DMSO- it is useful because it is readily absorbed into cells, and carries anything else with it- like the micro-nutrients in your foliar spray. DMSO isn't just absorbed by plant cells however, and it will gladly help your skin absorb anything as well: it is commonly used as a cream to help get medications through the skin and into your bloodstream. It works just as well at getting potentially toxic copper compounds or insecticides into your bloodstream, even things that would normally not be absorbed through the skin.
Kevin