I've used POR-15 for years and never had a failure. Including an entire 1953 Chevy pickup frame which has been on the road for 15 years now and the frame still looks perfect. The trick is to follow their directions and use their cleaners and prep spray. If you do that it will work....at least it does for me.
You have been very fortunate!
Following their directions and using the entire "treatment process" to the "T" still resulted in many failures, on several different levels. When it works, it was great, but when it failed, it failed miserably. The problem was you never could be sure which outcome you were going to get until the party was over. For what the stuff costs, it should work the perfectly every time, and that wasn't the results me and many others have gotten. Gene
