Batgung

I've just finished reading The Piano Teacher and quite a few of the 'factual' stuff bothered me.  Has anyone else read it?  In particular some of the things I'd like to know -

Was there as school in Pokfulam in the 1940's?

Was sun cream used? (I find the first reference in 1944 and it being a red gooey stuff)

How about Badedas bath gelee?

I couldn't help feeling the whole book was an extended marketing exercise.