Not sure if this applies since I use Apoxie sculpt.. But I have found that if you did use lotion, then wiping the pony down with Acetone when you are done working on it will help to completely remove lotion residue so your paint will stick. For me, the acetone also does great as removing the sculpting residue from the pony. If not, then a dull xacto blade gently scraping it does the trick.