hi dave, welcome to the forum.
I know what you mean about the pillion, my girlfriend wants to go around europe on the back of mine now too, didnt really like my last bike at all (gsx600f) think she feels a lot more comfy and safer with the backrest
I clean mine with wd40, not the brakes or plastics though, keeps it protected, lubricated and clean, but still wash with soapy water when it gets really dirty. Might switch to using ACF50 instead of the wd40 soon though just so its got the extra bit of protection through the winter.