The underside isn't fully coated like the exterior. The mfg coats the gasket grooves and any overspray into the underside is all it gets. It doesn't take much time for it to start deteriorating.
Two new covers are over $1200. Most people spend some time cleaning them up and reusing them. Take extra care to clean and smooth the gasket sealing grooves. I use a stainless wheel brush on a rotary tool.
|