Manners are free. You don’t have to be rich to afford it. All the more you need to have it if you’re well off.
Manners come hand in hand with attitude. Your attitude and how you handle things will show not only what kind of person you are but what kind of people your parents are and how they raised you.
Do your parents the favor of being polite to everyone even if you have differences.
Remember that majority are repelled by foul personality rather than unpleasant appearance.
Remember that it’s easier to change your attitude than your appearance.