standing shows trim replace

[geojaya]

How d0 I replace this fixture in my shower. Any feedback, who could be the manufacturer.

I opened the screw, but cannot figure out how to take out the outer layer

 

[havasu]

Looks like a calcified flathead screw to me. Spray some CLR or vinegar, let it sit, then try it again.

 

[geojaya]

there is water leaf from the shower side, hence I want to replace the trim

 

[geojaya]

I removed the screw in the middle but still cannot pull out outer hex knob/cover

 

[havasu]

Spray some penetrating oil all around the knob, then let it sit for 24 hours. You also may need a handle puller or apply brute force, but it will come off.

 

[Geofd]

Use clr,wd-40, vinagar soak it and let it sit for a while try it again later