What is brake solution?

I get a drag sound and sometimes a metal sound on one rear wheel with drum brakes usually on my first brake when starting out on a drive. I had this looked at a few weeks back and was told my brakes were ok, was told he blew it out. I assume this was to get any dust and grit out that might cause sound. Sound still there. Is this problem drum, shoe or both? Sounds like enough shoe is left but maybe it is glazed causing drag sound.

Try greasing the shoe pivot points and any parking brake pivots with high-temp brake grease.