More Catholics go to Ash Wednesday Masses (even though it’s not a Holy Day of Obligation) then they do actual Holy Days of Obligation.
Will you go to work, shopping, school, etc. with ashes on your forehead?
As long as you are NOT seeking to draw attention to yourself…
“(But) take care not to perform righteous deeds in order that people may see them; otherwise, you will have no recompense from your heavenly Father.” Matthew 6:1
…but rather to draw attention to Christ then I think the ashes should not be washed off…
"No man, when he has lit a lamp, puts it in a cellar, nor under a basket, but on a stand, that those who enter in may see the light."
…and if anyone utters anything against you, consider yourself blessed!
“Blessed are ye when they shall revile you, and persecute you, and speak all that is evil against you, untruly, for my sake: Be glad and rejoice for your reward is very great in heaven.” Matthew 5:11-12
Ash Wednesday: will you go about your day WITHOUT washing your forehead?