Duplicolor usually is a good match. Especially a color such as White....you should be okay. If you take a few minutes to lightly sand the edges around the scuff to "feather" them out, you'll have a more finished look and it probably won't start peeling off for a good while. Of course, clean the surface well before spraying. Also, give her 4 or 5 LIGHT coats, waiting about 10-15 minutes between coats. Good luck!