Nice collection of parts Dave. It's not a cheap exercise if you wanna do a great job on the resto. The last time I did a resto in 1996 my seat tray looked really bad like yours. These seats apparently always let water in to the foam and so hence the rust. I had my tray de-rusted and then zinc plated at an light aircraft workshop thats local to me. This in theory will stop any rusting happening again. After properly preparing the tray I was able to respray it black again. Good luck mate ......Adrian