Whats the truth about POR15?

[1952ssr]

I used Chassis Saver on my frame, it was rusted really bad. I liked it for the most part, it had a little more shine than I wanted. I have had instances where I bent the frame and it chipped as if it was like a eggshell. So time had past and I only had used half of my gallon and it had skimmed over so I chisseled (literly) the dried part, stirred it and applied it on some newly added pieces and it dried with a satin look which looked better. The first picture was after I did the frame and a-arms, the second notice the difference in the running board, the bed mount and the frame.