Here's two things we did to our Westy that we love:
1.  Tint the windows.  It doesn't have to be gangsta black, even a mild tint
will make a big difference in cooling and glare.  Tip:  The back side window
behind the cabinet can be easily removed, which makes it a snap to tint.
2.  Remove the screens on the sliders and spray paint them with auto trim
black paint.  They will visually disappear and create no more glare.
Happy trails,
Greg & Val
86.5 Camper Syncro WLE