It keeps them from oxidizing too. Also I feel most of the time it will not matter, but have seen time that it did make a difference. I was tying for some local guys last spring and they had some Chart/black/chart and also some black/black/chart and they could get bit on the ones with black heads, but could on chart heads. So I think sometimes it matters, but most of the time it just keep the lead from oxidizing which I really don't like jig heads to do so every time I get an order for unpainted heads I ask if it's okay if I just clear coat them and most say fine.

Guess I should add I don't think you will fund out on just one time trying it and may take much longer to really find out.

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