What is the difference in usage between "wash off"and"wash out"?

Question

Answer

If dirt is on you, you wash it off.
If dirt is in you, you wash it out.

Answer

wash out means to remove by washing or
to cause to fade by laundering and other meanings
wash off means to remove by using water and soap or other liquid used for washing
so
they can be used interchangeablly to mean washing by using water

Answer

wash outs are so out of it they can only wash off cars for a living :P