My advice would be don't buy the stuff in the first place. It's just an over priced wax job.
Partly wrong, partly right. Permashine is actually not a wax at all, it's a synthetic polymer sealant. You are right in that it's overpriced......WAY overpriced You can pick up a professional sealant from Menzerna, Chemical Guys, Zaino, Blackfire, etc for a fraction of the cost and you'll have the product for MANY applications. In short, stay away from their service!!
To the OP, unfortunately I would chalk this one up to a lesson learned.