I haven't bought Rejex in a long time, but after dealing with the soot and grime on the chrome exhaust tips of a new car, I decided to buy again. Today was the first time I washed the car after the application and the combination of soot/dirt wiped right with normal car wash soap.
Corrosion X is pricey compared to other similar products with WD or PB in their names, but I haven't found anything that this product can't un-stick or make so it doesn't stick. I lent some to a neighbor for a truck tailgate he could not get unstuck. He was amazed by its effectiveness.
I can't recommend both products enough. A little expensive, but very much worth the cost.