My mother in law gave me great tip that I use almost everyday. When I am getting dressed and accidentally get deodorant on my shirt or dress, I grab a pair of pantyhose wad them up into a ball and quickly rub the white stain out. This works so well never fails!
I hope this will help others because its frustrating enough just to figure out what you want to wear!
I used this tip and it works. I was going to throw a black dress out that I had washed twice, the second time using detergent and the white marks still didn't come out. Used the black pantyhose (tights in the UK) and it worked. Brilliant! Sue, UK