I have two complete sets of the '64 dash trim. One pair of the die cast end pieces were very nice with no pitting and nice chrome and the other pair were pretty-nice too with just some hazing in the chrome. When I took them to the chrome shop I asked the guy which ones I should do and he said to do the worst pair and leave the other pair alone because they were already nice. Usually the end pieces are pitted.
So I re-chromed the worst two pieces (which now are super show-quality) and had the straight pieces polished to complete the set for my '64 SS project and saved the other super-nice complete set to sell to some lucky fool.
I'll have pics next week when I get home and will post them in the for sale section.