silver flakes in brake fluid

[mweishaa]

Back in June I rebuilt my master cylinder with a kit from LMC. I developed a leak in the MC, so I took it apart today. What I found is a little puzzling. There was a lot of silver flakes in the fluid, reservoir, and in the MC.
You can see what I scraped out of the MC with a q-tip, and the pitting of the aluminum part. Not sure of that is what is causing it, or the 2nd pic below.

A better question is WHY is it happening. I'm running Dot3 fluid. Not sure what is going on here. Anyone seen this before or have any ideas?



Note the plating coming off.