Same, ACF-50. Put it on a rag and rub up and down the spokes, they won't look shiny, but they won't go rusty!

Coolant at the concentration in the Z shouldn't cause any corrosion problems, but I'd rinse off any painted parts just to be sure. More of a worry might be if it dribbles out while your at some lights and leaves a slippy patch on the road just in front of your back tyre!