That is indeed the correct part number. The clear coat will not wear away...you'd have to be constantly playing with the button for that to happen (but for protection I applied 3 coats - perfectly smooth).Small things like a worn button, once noticed, seem to acquire major importance. Well worth the small cost to eliminate the irritation.

I should add that the encouragement to remove and replace the P button, as well as the instructions for doing so, came from Addict in the "What did you do to your F Type today?" thread.