My 07 has the coated finish on the top yoke and a bare alloy finish on the bottom one, I had my top yoke replaced under warrenty as the coating was worming, new one is just as bad again. plan to polish it and the risers and forks this winter. its one part of the finish on my bike I am dissapointed in.
you can buy a cover for the bottom yoke, Triumph part
A 9738086 .