Tried to sandblast yesterday using a pressure sandblaster and Black Diamond media. Have used this same setup before with good results when I did my cab. Anyway, had trouble with the tip constantly clogging. The media was new in the bag and even a second bag did the same thing. It seemed like a piece of it would go at an angle thru the tip and get stuck. I tried the largest tip and still same problem. Any one with any ideas?