PAINT REMOVAL FROM CHROME BUMPER?

if they did scotch brite it or wet sand it they might have done you a favor if they weren't too aggressive. A good buff could make it look better than if they hadn't. They usually rust where they curve around the fenders or underneath. Soak some rags in lacquer thinner and lay them on the bumper. Let them sit for a while if it isn't real hot and sunny all the better. Remove the rags and wipe the bumper with lacquer thinner and see what you have to work with. I've had to do this before. Good Luck