I was recently asked a question about using POR15 and in reality, I have never used it, and all that I could get was some advertising comments about how it was a miracle paint that you paint over rust. In my searches, I found many times where actual users had mixed reviews, with some liking the product and others not. Then I happened on this 3-page discussion on a forum about how it works, and why it isn't the magic cure in a can as advertised. I will leave this determination to use it or not up to you the reader after you digest what this other forum says about the product. Click here...... http://www.spiuserforum.com/index.php?threads/why-is-por-15-so-frowned-upon.2604/