I tricked my friend into leting me practice painting on his mustang before i do my miata so this is my problem. see pics below. i think it is precipitation or oil in the air. I bought a filter thats supposed to catch all dirt, oil and precip. but i think it got thru somehow. after i painted this hood i went to lowes and bought another in line dryer in hopes to get any left over liquids out. any advice? please.