Re: Galvanized Paneled Roofs and Modeling Peeling Paint
I have used this technique on a few cars and I like the effect. I don't have any photos available right now, unfortunately.
I tried it on six roofs at once and I was satisfied with two of the six attempts. I tried a few with table salt (small granules) and a few with sea salt (larger granules); the table salt provided a much better effect. The best color combination for the undercoat turned out to be a mixture of light gray with ~20% Testors aluminum mixed in. Once the salt was removed I painted the seam caps with the original roof color and then weathered the whole roof assembly again with a little black powder to represent soot and dirt. The addition of a weathered running board really adds to the contrast and overall effect.
Yes, it's my understanding (because Ed has told me this a thousand times) that the seam caps were not galvanized so they would hold paint better. IMO the artist's objective here is subtle color contrast--contrast between the original roof color, the exposed galvanized surface, the weathered running boards, and the soot/grime overlay--all gently blended together.