Zinc Questions, read this first

There has been some very good information posted. The following references are all from IForgeIron on similar subjects. There may be more as the discussion comes up on a regular basis

first reference here

and here

Reference 1

Reference 2

Reference 3

Reference 4

Reference 5

Reference 6

Reference 7 post #30 on page 2

If you have already skipped down to this level, YOU SHOULD go back and read each reference from beginning to end. This will answer many of your questions.