On-line testing - the key to improved coating quality
Chances are that one of the reasons you started using powder was that it offered a superior finish relative to liquid coatings.
Occasionally, however, the cured powder coating your shop puts out is not what you'd call superior. In fact, it's defective. Sometimes you can see film defects at a glance; other times you need the results of tests run by your QC lab to tell you; the worst case is when you get the news from a customer.