What are the limits of permissible adornment for a veiled bride who sits facing people with her groom? Is it permissible for her to wear light makeup, kohl, or use a miswak?

There is no objection to a woman adorning herself for her husband with any permissible adornment she wishes, in order to increase affection and love. It is permissible for women and male mahrams to see her in such adornment, provided there is no fear of fitnah (temptation/discord). As for non-mahram men, it is not permissible for them to see her in such adornment, and she should not display it in front of them. Some common customs in wedding celebrations, such as the mixing of genders, are contrary to Islamic law and must be avoided.