This actually pertains to my CJ7 cause their frames are boxed and always rust, unlike a K5. Anyways, after I strenghten some areas I am looking for a good coating. Many people tell me to just brush on rustoleum, but I want a durable tough coating. I know por-15 is supposed to be good, but is it worth the money? there is the posibility that it might get driven in the winter from time to time so I want to protect it the best I can from road salt. What kind of paint have you guys used?