One of my wheels does not touch the ground for some reason so I was looking at the bottom of it to see if there was some kind of adjustment and noticed that the entire bottom of my grill was not painted. Luckily since it's fairly new there wasn't much rust but I wiped it down with alcohol and so far have one coat of hi-temp bbq paint on it. I'm waiting for it to dry so I can do another.
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Painted M1's, look under your grill.
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- Feb 2019
- 1529
- Salado, Tx
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Okay, I'm an old paint prep guy so forgive my bluntness, but if all you did was wipe down the rust you described with alcohol you might have taken off some oil like contaminants, but did nothing to remove anything but loose rust flakes. In other words, it'll be back sooner rather than later. You need to treat the rust, after scrubbing away any loose particles, with an acid to convert it to a more inert state. Use either phosphoric acid; e.g. coca cola, navel jelly, Rust Mort, or my favorite, straight out of the jug so you don't pay for mysterious packaging. The other alternative would be oxalic acid; Bar Keepers friend, or again, just buy it online in crystalline form without marketing foo fah, and mix your own. The net is full of methods (though most sites are targeting old car guys).
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The rust that I mention is not scaling type rust flakes but just flash type very minor rust that you would see with new metal that was exposed to moisture. It was the same type that I saw inside the grill before I seasoned it.
I'm not very concerned about it and obviously M Grills doesn't think it's going to rust through if they didn't paint it in the first place. I asked this same question on the M Grills FB group(not the official manufacturer's page) and one guy responded that his was not painted either. If it does rust through the paint I put on, I will just do a better job and use some of your suggestions. Thanks for the information.Last edited by 70monte; May 20, 2020, 06:20 PM.
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We do not paint the bottom's of the M1's. The bottoms are recessed up within a protected wall so they do not see the harsh environments. If you get any surface rust it would take much more than your life time for it to rust through 10 gauge American steel. (not Chinese steel) BIG difference.
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Originally posted by M Grills View PostWe do not paint the bottom's of the M1's. The bottoms are recessed up within a protected wall so they do not see the harsh environments. If you get any surface rust it would take much more than your life time for it to rust through 10 gauge American steel. (not Chinese steel) BIG difference.
I'm curious if not having any paint on the bottom would make the problem even worse.
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Originally posted by M Grills View PostI`m not sure what the thickness of steel is on the underside of a Good One, but you will not rust through 10 gauge steel anytime soon on the M1.
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