Go near Ramones House of Body Art and you can see Ramone giving a quest. He asks you to get a free body customization in his shop. Go in his shop and customize how you want it to look. Return to ramone and he will give you your reward.
When you finish the quest Ramone will give you few coins and a free paint job.
Note: When you finish your customization he will not allow you to do it again for free. If your a non-member you cannot pay for it the next time.