expatriated
Well-known member
I'm reposting this from the ESEE Forum since another member asked about it in another thread.
There are many techniques for removing scale and rust. Many of you are wizards with electrolysis. But this is the method I use to restore old cast iron pans.
Before:
$10 at a local antique store.
What I use. Lowe's. $15. You only need half the bottle and you can re-use the solution over and over again. You want it to be 100% Lye. There are some drain cleaners that have lye in it but it also has other harsh chemicals. Alternatively, or if you're planning on doing dozens of pieces, you can order lye online. Preppers who make a lot of their own soap do this. So do meth heads. But, we're all friends here, right?
This pan is small enough to fit in a 5 gallon bucket so that's the best case since I can put a tight-fitting lid on it and it won't splash. Fill it up a few inches over the top of the pan. I used warm water. Carolina Rose is supervising
(She ought to be out catching me some rabbits but it's back to zero degrees here so she doesn't spend too much time outside.)
What it looks like when you add the lye. By the way, for safety's sake, always add the lye to the water, not the water to the lye. It can bubble up and splash around.
2 days in the lye....
4 days in lye:
I took the pan out to take a look at how it's coming along. There was a few spots with some caked on scale that I COULD scrub off with steel wool but why expend any effort? I threw it back in the bucket for another day or two.
You'll notice quite a bit of rust under that scale. Lye does nothing to rust. That's what the vinegar step is for. After I scrub it clean, I'll soak it in vinegar for a few hours and the rust will all be gone.
It is a Wagner! :
You'll notice the bottom is pitted a good deal. I'm planning on using this pan as an outdoor pan (grill and campfires) so it means little to me how it looks, just how it performs. It will probably clean up a bit better than it looks in this photo and once it's seasoned, it'll be fine. Again, if you like your stuff to be really nice looking or you just want to experiment, you can take a grinder to the bottom and smooth it out to your liking.
Stay tuned.... In another day or so, it should be baking some biscuits or a fajita steak or an apple pie or ......
EDIT: 2/27/14 UPDATE:
Ok, done with the lye soak. Pulled it out and rinsed it off. Lye did its job but now we have to address the rust, since lye won't work on rust. So I soaked it in the sink in a mixture of vinegar and water. I would have used straight vinegar but I didn't have enough left to cover the pan so I added water to fill over the top.
You might can see how yellow it started turning almost immediately. That's the rust coming off of it. You can actually see it floating away.
An hour later in the vinegar. What you see is floating rust.
Ok, here we are completely stripped and rust-free. You can see some discoloration in the metal that will not come off. There's really nothing to come off, it's just discoloration. That shouldn't bother you. Once it's seasoned properly over time, it will be an even, consistent dark color anyway.
Difference between the old stuff and newer Lodge: Machining. The old ones were machined smooth inside once they were cast. Helps with seasoning and with the subsequent non-sticking.
Handle looking nice. #5 of course.
Again, some discoloration on the bottom but nothing to worry about. Nice, solid pan.
Here's a good example of how well the vinegar works. Look at the pic above of the handle that shows all the rust. Not a speck now
Stay tuned...Seasoning in the oven right now. Tomorrow will be pics of the final process
EDIT: 3/1/14
Here's the pan after a few layers of seasoning. I went with REALLY thin layers of seasoning this time as an experiment. It seemed to do better avoiding the sticky sections that you sometimes get if you put it on too thick. I will continue seasoning it until it is all one consistent dark black color.
I'm officially finished with this post
(A couple of you have sent messages asking for permission to repost this in BF and other places. You guys can always repost this or anything else I put up here.)
There are many techniques for removing scale and rust. Many of you are wizards with electrolysis. But this is the method I use to restore old cast iron pans.
Before:
$10 at a local antique store.
What I use. Lowe's. $15. You only need half the bottle and you can re-use the solution over and over again. You want it to be 100% Lye. There are some drain cleaners that have lye in it but it also has other harsh chemicals. Alternatively, or if you're planning on doing dozens of pieces, you can order lye online. Preppers who make a lot of their own soap do this. So do meth heads. But, we're all friends here, right?
This pan is small enough to fit in a 5 gallon bucket so that's the best case since I can put a tight-fitting lid on it and it won't splash. Fill it up a few inches over the top of the pan. I used warm water. Carolina Rose is supervising
What it looks like when you add the lye. By the way, for safety's sake, always add the lye to the water, not the water to the lye. It can bubble up and splash around.
2 days in the lye....
4 days in lye:
I took the pan out to take a look at how it's coming along. There was a few spots with some caked on scale that I COULD scrub off with steel wool but why expend any effort? I threw it back in the bucket for another day or two.
You'll notice quite a bit of rust under that scale. Lye does nothing to rust. That's what the vinegar step is for. After I scrub it clean, I'll soak it in vinegar for a few hours and the rust will all be gone.
It is a Wagner! :
You'll notice the bottom is pitted a good deal. I'm planning on using this pan as an outdoor pan (grill and campfires) so it means little to me how it looks, just how it performs. It will probably clean up a bit better than it looks in this photo and once it's seasoned, it'll be fine. Again, if you like your stuff to be really nice looking or you just want to experiment, you can take a grinder to the bottom and smooth it out to your liking.
Stay tuned.... In another day or so, it should be baking some biscuits or a fajita steak or an apple pie or ......
EDIT: 2/27/14 UPDATE:
Ok, done with the lye soak. Pulled it out and rinsed it off. Lye did its job but now we have to address the rust, since lye won't work on rust. So I soaked it in the sink in a mixture of vinegar and water. I would have used straight vinegar but I didn't have enough left to cover the pan so I added water to fill over the top.
You might can see how yellow it started turning almost immediately. That's the rust coming off of it. You can actually see it floating away.
An hour later in the vinegar. What you see is floating rust.
Ok, here we are completely stripped and rust-free. You can see some discoloration in the metal that will not come off. There's really nothing to come off, it's just discoloration. That shouldn't bother you. Once it's seasoned properly over time, it will be an even, consistent dark color anyway.
Difference between the old stuff and newer Lodge: Machining. The old ones were machined smooth inside once they were cast. Helps with seasoning and with the subsequent non-sticking.
Handle looking nice. #5 of course.
Again, some discoloration on the bottom but nothing to worry about. Nice, solid pan.
Here's a good example of how well the vinegar works. Look at the pic above of the handle that shows all the rust. Not a speck now
Stay tuned...Seasoning in the oven right now. Tomorrow will be pics of the final process
EDIT: 3/1/14
Here's the pan after a few layers of seasoning. I went with REALLY thin layers of seasoning this time as an experiment. It seemed to do better avoiding the sticky sections that you sometimes get if you put it on too thick. I will continue seasoning it until it is all one consistent dark black color.
I'm officially finished with this post
(A couple of you have sent messages asking for permission to repost this in BF and other places. You guys can always repost this or anything else I put up here.)


Ask any old timer why food taste so much better in a cast iron skillet. You'll never get that flavor in a Teflon pan.