I have minimal experience with automotive decorative chrome, but design and build custom machine tools with industrial chrome. Hard chrome is typically applied to worn or under size surfaces to restore size. Always need to be ground back to a specific, finish size. Seldom practical to apply over .015 inch.
We use satin chrome on handles, levers and knobs to prevent corrosion and improve appearance. Same as seen on Starrett micrometer frames and machinist's pocket scales. Essentially the same electrolytic processes as hard chrome. But surfaces are first vapor blasted with a micro abrasive to achieve a uniform, mat finish. Chrome application is no more than .0001-.0002 inch. Has become increasingly expensive.