I have some jig heads and bullet weights that are painted and some unpainted. Some jigs too. I don't really think a fish cares whether it is painted or not. It's a sells gimmick as far as I'm concerned for us silly fisherman. If it looks neat, pretty and is attractive to us anglers then we think it should have the same affect on the fish only the fish don't know it yet. Nobody has told them! I've seen some absolutely ugly colors on baits that worked for some unexplainable reason other than the angler simply got the bait in front of the fish! Most of the time colors of baits are designed to catch fisherman first and foremost. The manufacture doesn't really care if you catch a fish or not. They are simply out to make them pretty and to sell the baits. But if they hit on a color for a big national Tx. win and it produces again elsewhere then that's a bonus and they have repeat business. On occasions I have seen where a color maybe made a difference but I think it's rare. Occasionally in clear water, muddy water or if you are fishing in the day time or night time there might be some difference. But most of the time if a fish sees a bait, wants it and it's in front of him he'll bite it! I don't think they care about the color of the eyes, scales, weights or hooks. Remember those silly ads about bleeding red hooks and bleeding baits that would attract fish? Then the ads came out about the red fishing line because red was invisible in the water to fish!? Well, which one is it? Is it an attractant or is it invisible? I don't think a fish looks at a worm and then sees the weight painted or unpainted and says to himself, that doesn't look right. And most of the time the weighted end of the bait is down in the grass, mud, rocks and gravel or whatever anyway! JMO!