by Carol Sandler, KW Cages - CA
To keep metal trays, pans, and sloping metal parts like new, spray it with swimming pool paint when you first get it. Use the swimming pool paint without concrete added. Apply two coats of paint and let it dry for two weeks. Trays that I have treated this way have lasted eight to nine years.
HLRSC Official Guidebook - 5th Edition 2002