As someone who lives close to the sea and likes to use my cars over the winter on salted roads chrome is a waste of time, the quality of the later original chrome work by Tuckers on the Bristol 411's was pathetic anyway, by far the better option is Stainless Steel, I have this companies bumpers on several of my cars, but for those who absolutely must have a chrome finish do what one restorer does and chrome these stainless steel bumpers, perfection and longevity but at a price.
https://groupharrington.com/brand/bristol/