Replacing shower parts?
 

I was wondering how easy or hard it would be to replace things like the drain cover, or the spout (where it comes out if you want a bath instead), or drain switch in a one piece plastic tub? They are rusty and dingy, so I was hoping to get shiny new pieces.

Also, what about replacing the metal bars in the tubs that are along the walls.. is that easy or even possible?

The tub drain and overflow come in 5 or 6 peices and, once you take the old one out, it is relatively easy to install the new one.

If those bars were installed at the factory, it will be a big deal. You may want to get a regular surface mounted grab bar, cut the old ones off flush and get a plastic plug to put in the holes.
Glenn

The spout is screwed in. You can remove by turning it counterclockwise. When installing the new one, cover the spout with a rag to prevent scratching the shiny surface.