I wrote before of RedCircle pencils (aee here). I recently purchase RedCirle pensil in gold:
I do not know whether the innards of the pencil have changed from previous models or colors.
There is a very good review of redcircle pencils here. The main problem, as I see it, is this: "To keep the lead from falling out of the pencil when the button is clicked, there is just a random piece of rubber in the tip of the pencil. It is not glued or otherwise held in place, just resting in the tip of the pencil." I did not see any "discoloration due to oxidation (rusting)". The random piece of rubber presents a problem, if you take apart the pencil--I lost it.
I have been using the silver version without a problem for at least two years.