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Message: [QUOTE="SUbear, post: 3128354, member: 892"] Galvanization can help rusting but can not stop it entirely, I do not think this is galvanized steel, but do not know for sure. Painting can temporarily stop rusting but all paints end up chipping off and failing just look at any older overpass or bridge supports that must be repainted periodically. Newer bridges generally are built with the rust proof steel, no matter what you call it. Expense is generally considered well worth it because of downstream savings in maintenance costs and longevity. Then of course there is the even more expensive stainless steel with its nickel content adding strength and rust protection. I admit I have no direct knowledge of what they are doing on the dome. Perhaps someone at some time will give us an engineering overview or not. I think the best material would be stainless, which would be a shiny metallic and with a primer could be painted as desired. [/QUOTE]