I have an old freezer that I still use as a freezer and it has that plastic smell as well. I wonder if there is something you can coat it with to cover the smell. Or how about removing the plastic all together and replacing with wood/cedar and reinstall the metal shelving? Sounds like a PITA but might be worth it. I can only imagine how many sticks and boxes I could cram in my freezer if I ever converted it in to a freezerdor.