I have an MES 40 that I'm trying to fix up - and I've finished all the wiring, now it's time to work on the inside. I'm not going to be using the internal probe, and I've removed the chip tray so I can use a mailbox mod. However, the last thing I need to figure out is how to fix/repair the completely rusted grates. I've tried to soak in a water-vinegar mix, and it helped to remove some of the rust, but a lot of it remained, and since I haven't been able to work on it for 6+ months, the grates have all completely rusted again. Any suggestion on how to fix the rusted grates, or do I need to purchase brand new ones? I've read the MES 40 grates are chrome plated - is it even possible to fix these so I can use them again?