Enjoying the fine weather this afternoon i decided to wash the 16v, as i was cleaning the wheels i noticed these brown type stains on the near side front brake disc, tryed rubbing them off with my finger but were dry. Also noticed two drips on the inside of the arch, which were wet to touch...looked like oil from somewhere.... also recently noticed a faint "shwwr" noise when drivng almost like an airy sound. Anyone got any ideas?...also will those stains damage/affect my breaks?