They need to be 18, you need to be 18 and you need to make them sign a model release and take ID shots, document the shoot according to the 2257 record keeping requirements. With the newly proposed 2257 version, nonude or "just tits" is no longer an exempt. Make sure to get those docs and all required cross referencing right and in paper form, digital record keeping will be insufficient with the new 2257 version.
Keep in mind: Nonnude is a dying market, all successful nonnude girls look pretty young and have perfect bodies, loads of attitude, they love the camera and the camera locves them...and sooner or later members will quit if the girl doesn't want to show more. In addition, nonnude sites require alot of member interaction, mails, chat, camshows, diaries...it's a real pain to keep retention at an accptable level. It boils down to: Either she's a real diamond, willing to work with you long term or it's wasted time.
My advice: Have fun, do anything you want for private use, but stay away from the troubles ahead...if one of the girls would ever change her mind ( and there are loads of reasons like friends or family seeing them on the web, new boyfriend, etc. ) you'd could be really, really fucked. High risk, little return.
