My 10 year old son and I are in the process of bodywork on our 69 GMC 1 ton dually. We have removed the rocker panels and want to clean up the inner panels and was wondering if after getting them cleaned if we should brush on some POR? It may be a while before we are ready to put the new rockers on and was wondering if you can weld to the POR? Also there are many suppliers that have rockers for this year of truck, most seem to be in the high teens for price. Is there a difference in quality between suppliers? Thanks