Wierd turnbuckle colour

[MRD]

Ive always thought the standard FT turnbuckles on the B4/44 were abit of a gash colour, but today while cleaning the ball cups with motor cleaner I accidentally wiped the turnbuckle and it came up a much better colour blue. I wiped one properly and it came out fantastic, so I've done them all .

Whats the deal with the reaction?, or is it just the excess anodising thats been wiped off a bit making it lighter? Whatever it is it looks ten time better.