plasticpaul,
I understand your desire to have shiny baits, but as you mentioned that your dull baits still catch fish. I for one can't tell if a bait is shiny or dull once it's in the water. Maybe it has to do with reflection or something, but once they get past a certain depth does light play a roll in this. I don't have any resin or pop molds, but I have treated some cavities on my aluminum molds with an etching solution to achieve a dull surface to make dull baits and they seem to work just fine. Just my .