I recently tried some evapo-rust on an old rusty humming bird feeder my Mom has. Not deep pitted rust, but, thick enough rust that a wire brush was of little use.

All I can say is WOW! Left a part soaking in evapo-rust overnight, and it came out like new......




I wasn't able to fully submerse the part, so you can easily see 'before and after'.



John

The dream is dead, long live the dream.......😥