Paint hazy after coolant spill

Just for “ha-ha’s” try wiping it with WD-40.

Paint goes south because the oil evaporates over time. Wax covers it up and protects the oil from escaping. Try a small amount of WD on a small spot. See if adding oil removed the spot and restores the color. Also another chemical I’ve used is Nu-finish. It works great on old paint. It will remove the oxidized top layer so rub cautiously. If either don’t speak to you- that’s okay. These have worked for me.