I don't know why I waited so long to purchase the California Duster - it's been the perfect addition to keep our Airstream (outside) looking fantastic!!!  It works perfectly.  I'm incredibly picky when it comes to what gets used  on our Airstream and didn't hesitate to use this duster.  Once out of the box, I allowed the duster to settle outside for a bit as per the instructions.  It won't scratch and with the added wax (already added) it gives one amazing shine.  I'm actually looking to purchase another one for my truck - it gets pretty dusty/dirty and I would hate to use the same one for both - again, not wanting to scratch the aluminum (not that you could not). The wood handle is a nice touch, sturdy and the whole brush looks like it would last years (with proper care of course).  A definite buy !!!