This word is also in the OED, but I'm not sure if it's in any other dictionaries. In fact some dictionaries don't include
flecky. We do accept
flecky. The OED has a single citation, from 1833, about the surface of a sword blade. The word was used by Herman Melville in his novel
Mardi, also talking about a blade:
And though tempered not in Tagus or Guadalquiver, it yet revealed upon its surface that wavy grain and watery fleckiness peculiar to tried blades of Spain.
I suppose there have been some more recent uses of the word, but I didn't spot any. I'll allow it as a rare word.