I heard one shop mechanic say, if you put in the time, patience and prepare the surface correctly, some of the paints can look quite good and realistically like chrome though, probably still a step below.
Also, here's a good take:
"I agree that most spray commercial spray paints don't approximate chrome. This has to do with the differences in surface architecture between a plated surface and a conventional metallic pigment. (bounce angles of light, uniformity, dispersion...etc). However, there is a new generation of coatings based on VMP (vacuum metallized pigments) that do in fact approximate chrome. You see this in the automotive industry as many of the interior chrome parts are now a coating instead of conventional chrome."