I think most of that will buff out.....
Look at the bright side, if it does NOT buff out, two more sales for some helicopter manufacturer. My mother always used to say "It is an ill wind that does not blow someone some good.". There should also be some added work for the people who paint the numbers on the tarmac, for the paint mgf. and supplier ('cause those numbers have to be bigger, obviously), training time for helicopter pilot instructors, helicopter maintenance people instructors, etc., etc. ad nauseum. And it all goes into the US GDP bottom line.... so I, for one, say 'Well done, Pasadena Police, for providing this unexpected and gratuitous boost to the American economy!'.
Brian
http://youtu.be/qHMhsD8OFCs