![]() ![]() Remember, this is a difficult problem to solve, with no good answers.Ĭold galvanizing compound is basically paint, but with 90% zinc instead of the usual fillers and colorants. I haven't actually tried cold galvanizing compound over rusty metal. I am also experimenting with plain ole Rustoleum 7769 rusty metal primer, then a much better primer and paint, just to see if it'll perform as advertised. However, it needs to be primed and topcoated, because epoxy by itself is vulnerable to UV light and will turn to swiss cheese. ![]() I used it because I was using fiberglass mat to bridge some holes. ![]() To my surprise, West System epoxy used as a paint has held up 3 years so far. If I'm not, then I do what I can with hand wirebrushing and palm sanders, heat it over 212F with a hair dryer (to remove all water), wipedown, and then. Either I'm willing to break out the gear and do full-on media blast to SSPC.SP10. Out of heavy disc sanding, abrasive-disc grinding, needle scaling and media blast, media blast to near-white metal (SSPC.SP10) wins, needle scaling is a distant second, and the others aren't even worth the trouble.įor removing rust, I decide how serious I am. Your choice of paint is not as important as your surface prep.Ĭhemical rust "converters" don't do much. I spent hours reading it, and sure enough, their advice conforms to my experience fighting the same fights. They throw serious money into corrosion research, and they have a web site just for that. You have a roof which is also shaped to provide a roof drain not on the edge. Galvanized steel is quite a good roof, until it's not. Long answer: you're not going to like it. Careful pricing this solution, the rubber is cheap enough, the cost is in the adhesives. Or you could consider over-roofing it with EPDM rubber, using the rubber-cement-like glue to stick it down (paint both surfaces and join them). What you do at that point depends on what you used. Short answer: go to the hardware store, buy whatever, paint it down and watch it fail in a few years. ![]()
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