AutoRestorer magazine ran a comparison test between POR15 and Eastwood's Rust Encapsulator. I was very surprised to read that they found POR 15 "poor" for the following reasons: extremely long drying time, solvent popping, shrinkage over time, and doesn't stop rust creeping. The products were tested on an old rusty hood in four different areas. The Eastwood product was superior in all respects. It will be interesting to see how POR 15 responds to the article. All in all I was surprised to see how poorly the POR 15 fared. I am having 2nd thoughts about using it (just bought the starter kit). Has anyone in our group experienced any of the same problems?