I have a question that's not really RV related but I have noticed a wealth of experience on this site in the year or so I've been a member so here it is. I have to paint the inside of a galvanized cooler here at the brewery and I'm wondering if anyone has experience with painting galvanized steel, it has a lot of white flakey spots that I guess are oxidation of some sort, I'll have to clean these off but is there any special kind of primer or pain for galvanized steel?