Greetings All, CRC do a rust 'killing' product, in a spray can and in liquid form in a bottle. The CRC product needs to be covered by paint but this can be done up to many weeks later. I'm happy to use the CRC product again and when the spray can is empty, I'll be buying the product in a bottle, a lot more economic. You can apply any brand of paint you like on top of the CRC product. The POR15 system I've used but sadly in my case failed. The chassis I'd had blasted and then applied the por15 system had sat in dry storage for two years, developed 'spider' rust under the coatings. A total waste of money and time, I won't use POR15 ever again.
Cheers, Ian.