I believe that the Lord Jesus will use us where ever we go. There are some aspects of modeling I take issue with.  as a Christian you have the Holy Spirit living inside of you.  Therefore to abuse your body so that you can stay slim is not an option for a Christian.  We are to have healthy bodies for they are the Temple of the Holy Spirit. God is very concerned about how we use or abuse our bodies. “Do you not know that your body is a temple of the Holy Spirit, who is in you, whom you have received from God? You are not your own; you were bought at a price. Therefore honor God with your body” (1 Corinthians 6:19-20). Christians are not to try to look like the world; rather, we are to be a special, purified people (Titus 2:14), people who are set apart as belonging to the Lord. Christians should be well dressed and appropriately fashioned, not to bring the focus on ourselves, but so that we can go about the work God has for us without being overly concerned about our appearance. Women, especially, are exhorted to dress modestly (1 Timothy 2:9), and, since only the most successful models are given the choice of which clothes to model (unless the model wants to remain unemployed), it is hard to see how the modeling industry is compatible with a Christian worldview and dressing modestly. 

There is a considerable amount of drugs and immoral behavior in the fashion industry. Young women are often used and abused by those in power. The highly competitive nature of the industry leads to greed, dishonesty, and cutthroat tactics. Those whose living is dependent upon the success of a designer, fashion house, or product line are at the mercy of these tactics. While it may be possible for a Christian to be in this world and not be affected by it, 1 Corinthians 15:33 warns us, “Do not be misled: ‘Bad company corrupts good character.’”

Romans reminds us that Christians are to be set apart from the world, especially aspects of the world which are ungodly. Once we have accepted Christ and pledged our lives to Him, then we are ready to do some real modeling, because there is no greater calling in this world than to model Christ.