....The only kits that it would be worth the expense of Chrome plating certain parts and pieces would be the higher end Pocher models.....with your average ,off the store shelf kit you would have more money tied up in plating than what the kit, built or un built, would ever be worth.
As I recall , there was a rather braggadocious builder on another forum that spent some good dollar on getting some parts and pieces plated on an average, mundane off the store shelf kit a while back....I wasn't impressed with what I saw ...now days a rattle can and some effort can give you what your after.