I have a hf water trap, but I also have the fancy "toilet paper" style drier/filter, and a pre-gun throw away type filter as well.
this was a test to:
a. see if I could still paint (oh wait I never really was a painter, i just watched one)
b. what level of prep is required for this color to look good (holy crap it needs to be perfect)
c. verify I love the color (Yep!)