This may be getting a bit off topic, but for what it's worth, I do powder coat my lead I use in my line-through swim baits due to this. If you look at many of the swim baits out there, over time the lead insert and the plastic have a reaction that turns the plastic white (and the lead seems to turn white inside the plastic as well- look at any of the big name line through swims available today and they have the same problem.) This is especially not cool if the bait is translucent or clear. Powder coating cancels the problem.
Good thread!