[Retro]

I used this por 15 when I stripped and rebuilt my basement. It uses a rust neutralizing primer then the coating. Its amazing stuff!! Ill never use anything else, especially where theres rust. One caution, dont get it on your skin!! I swear it will be there for a week!!
https://www.por15.com/mobile/POR-15-Rust...g_p_8.html
With the tray I would rebuild it. Clean the tracks and replace the bearings. If its too far gone replace I the whole tray. Just my 2 cents!!