Por 15 is one of the best products out there for rust conversion. It also sticks to the metal great! The UV thing won't be a problem once the body is on. Nice to hear you can spray the stuff. I've painted most of my frame and differential with it. I also have a disc brake caliper paint kit from them that I haven't used yet, except for the cleaner which will strip grease easily also an excellent product. Your frame came out looking great!