About a year ago I had a technician clean the fins on the outdoor unit of our A/C. Upon doing so the black paint on the fins was removed, now it looks like crap and I am sure it is less efficient! Is there any reason why I cannot/shouldn't spray paint them black? If so, is there a special paint to use to help the fins reject heat? And is there anything else I need to be aware of other than covering all the components inside the unit prior to painting? Thanks! Happy 4th!