I'm sure many of you over the year have seen sinkers that have a bit of corrosion on them.
I tried Coca Cola several years ago (aka battery cleaner)...didn't work.
Today...I tried a product called CLR.
You can tell when the batch is finished because the foam will disappear.
End product...like new again.
Once you have cleaned the amount you need to...rinse & soak them in hot water for about 15 minutes to remove any CLR residue.
I'm sure this would work on jigheads too...and I would bet the CLR won't harm the plastic fiber weedguards.