I'm a beginner, done my first throw up. I used Loop Colors white with the standard loop cap that comes fitted, and Loop Colors black also with the standard loop cap. I found the two cans were totally different. The black can seemed way more pressured, the paint shot out real fast.... much faster than the white. When I was spraying with the black to do my outlines i was about the same distance to the wall as with the white can, but the black came out so fast i was getting runs, had to move further back then got outline which was too fat and not crisp... Is this normal? I probably just need loads more practice on technique. Do i need different caps?