All about platinol

[Sheen]

Here's my first go using platinol. Applied with a cotton bud, undiluted, then rinsed under a hot tap. I found with the copper parts it came out silvery which is a little bit of a shame as i prefer the brown you get with los, but it's a lot easier to use than los. I rubbed it back a bit with sandpaper. When i used a pro polish pad it made it more silvery.
A few questions for everyone: if using diluted how much by? Can you keep it diluted in a container for a long time. Can you dip with stones attached such as fluorite and labradorite etc. Is there a way to make the copper come out less silvery? Should i use bicarb to neutralise? Is there no respiratory risk with platinol?