I used Jessica Fusion on mine, which had a tendency to peel - applying two coats with lots of strokes as instructed. It did work and now I use a different basecoat. You can use Fusion alone or under a colour. Jessica stuff is expensive but cheaper on-line at Feel Unique. No P & P charges and no minimum spend. It's a good site for lots of other products too.

http://www.feelunique.com/

Jane x