spinnerbait Q's

[Infisherman1]

I've been fishing spinnerbaits a good bit more lately, and have had quite a bit of success, but I've got some questions as to things I have seen.
Usually when fishing muddy and mutky water I go with a single big colorado blade and a dark color skirt. Colorado blades are attractive to bass because they make so much vibration in the water, which is great for muddy water, and naturally in muddy water I'd go with a dark skirt. But, I've seen a few people (one person lives by me and knows what he's doing, he's a pro) fishing colorado blade spinnerbaits with white/chartreuse skirts. Whats the point of doing this in muddy water?
Also, when is it appropriate to fish with painted blades? I don't really see much use in spinnerbaiting if there isn't any flash to the bait.
Any extra tips from experienced spinnerbaiters would help, especially as to which skirt colors to use in different situations.