mobiltec
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1954 Jewel In Progress...
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Post by mobiltec on May 19, 2021 6:49:54 GMT -8
One thing you should all know about mill side aluminum these days. I basically wasted $2500 buying aluminum white on one side and mill finish on the other from Hemet Valley. This probably goes for all sellers of aluminum siding now. The EPA made the manufacturers change the formula for the coating they put on the mill side. It scratches WAY too easy so it can't be left like it is. You MUST put a clear coat over it. And be very careful not to scratch it during installation. And never roll it up for transport. That too will scratch it. It's terrible and I will never use it in that fashion again. I say use raw aluminum and polish or clearcoat. I had to buy aluminum for the Mainline 3 times... It's been a very expensive endeavor.
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Post by wisconsinjoe on May 21, 2021 8:21:22 GMT -8
One thing you should all know about mill side aluminum these days. I basically wasted $2500 buying aluminum white on one side and mill finish on the other from Hemet Valley. This probably goes for all sellers of aluminum siding now. The EPA made the manufacturers change the formula for the coating they put on the mill side. It scratches WAY too easy so it can't be left like it is. You MUST put a clear coat over it. And be very careful not to scratch it during installation. And never roll it up for transport. That too will scratch it. It's terrible and I will never use it in that fashion again. I say use raw aluminum and polish or clearcoat. I had to buy aluminum for the Mainline 3 times... It's been a very expensive endeavor. Can that coating be rubbed off with steel wool? Will that inferior coating also be on the 0.40 truck siding aluminum that I can find locally?
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sawset
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1958 Mobile Scout
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Post by sawset on May 21, 2021 17:14:19 GMT -8
We use a lot of aluminum where I work, 100(0)s of sheets, per day, both painted and mill finish. From what I can tell, it is either one or the other: Mill finish has no finish, comes "as rolled, slit, and ctl".
Painted comes with a colored side, and a clear side. The clear, I'm told is not uv resistant, so would not be a good idea to expose it to sunlight directly. No I would not try to remove it - its baked (cured) on, and would be miserable to remove (very much not worth it). It adheres very well - enough to run it through forming equipment. You could bend a pretzle out of it and neither the paint nor clear will flake.
Truck van liners and roof material we don't work with. The end use for us is for commercial freezers, where thorough corrosion resistance is required. Trucking req. may be different.
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mobiltec
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I make mistakes so you don't have to...
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1954 Jewel In Progress...
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Post by mobiltec on May 22, 2021 17:16:27 GMT -8
One thing you should all know about mill side aluminum these days. I basically wasted $2500 buying aluminum white on one side and mill finish on the other from Hemet Valley. This probably goes for all sellers of aluminum siding now. The EPA made the manufacturers change the formula for the coating they put on the mill side. It scratches WAY too easy so it can't be left like it is. You MUST put a clear coat over it. And be very careful not to scratch it during installation. And never roll it up for transport. That too will scratch it. It's terrible and I will never use it in that fashion again. I say use raw aluminum and polish or clearcoat. I had to buy aluminum for the Mainline 3 times... It's been a very expensive endeavor. Can that coating be rubbed off with steel wool? Will that inferior coating also be on the 0.40 truck siding aluminum that I can find locally? All I know is that it scratches just by looking at it wrong. I had a terrible time installing it without damage. We put a UV resistant auto clear coat on it. Two actually. Hoping that does the trick. The .040 truck aluminum comes with some sort of coating also that IS UV resistant. But trying to get that stuff un-damaged is tough because of they way they move the coils around with a fork lift. I bought that first and when I opened up the coils it was all screwed up from the fork lifts. You just can't win any more. If you want Shiney Aluminum Steve Loomis sells .024 Shiney with a plastic covering that you remove once it is installed. I am using that on my 54 Jewel which will have 4 inch brakes in it. It's like a mirror finish. And it's expensive.
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