Cat problems

["Henry" <henry@xxxx>]

I keep my D in an open garage (no door), covered with a California Car Cover. Nonetheless, there is a neighborhood cat (or cats) that has turned one corner of my car cover into a scratching post - practically shredding it. There are a few light scratches on the facia and black bumper, but nothing too deep. Any suggestions on what I can do to keep cats off the car cover? And please don't suggest installing a garage door - that's not an option. 

thanks,

-Hank