Stinger Spoons..... Copper vs Gold vs Silver backs?

[thompsm7]

Could anyone tell me what methodology they use for what finish they use on the backs of Michigan Stinger spoons for browns? I've seen some success using copper backs, but don't really know why that is. I was hoping to better understand why one selects a certain back finish. Thanks for the info.

[Gill-T]

Gobies

[buckboardjr]

The fish have heard about the price of copper being up so high is all I can figure!