Ceramic Glass Crazing? Gambler?

Modern and vintage hand fired coal stove are similar to a wood stove and in some cases can burn either. They need to be regulated and fed by hand usually every 12 to 24 hours depending on your usage. They require no power to operate making them ideal for rural settings with long power outages.
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Ashcat
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Hand Fed Coal Stove: Hitzer 983
Coal Size/Type: Nut/Blaschak
Location: West Chester PA

Post Sun. Jan. 04, 2009 9:39 am

Anyone found a remedy for crazing--the development of multiple, small linear or web-like cracks in glass? This isn't a cleaning problem, so much as a polishing problem. Last year, Gambler said in a post that, at the end of the season, he was going to try polishing the surface, but I never saw him post any results of this. I just tried some test areas with Rain-X and NuFinish, with no apparent benefit. Here are a few pics highlighting the problem.
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CapeCoaler
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Stoker Coal Boiler: want AA130
Hand Fed Coal Stove: DS Machine BS#4, Harman MKII, Hitzer 503,...
Coal Size/Type: Pea/Nut/Stove
Location: Cape Cod, MA

Post Sun. Jan. 04, 2009 9:48 am

Have we asked Dean at Hitzer about the problem, a solution and how to prevent the problem from developing in the future?
If they are more than surface scratches or actual cracks no amount of 'polishing' even with compound is going to cure the problem.
If it is just scratches then polishing will be the answer, just what kind of compound.
I am not an engineer, train or otherwise!
I stay at a Holiday Inn at least once a year!
Most of all I do have common sense and a practical application of logic.
Oh, add humor, on the dry side, along with a wee bit 'o sarcasm.

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Ashcat
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Posts: 420
Joined: Mon. Aug. 18, 2008 10:29 pm
Hand Fed Coal Stove: Hitzer 983
Coal Size/Type: Nut/Blaschak
Location: West Chester PA

Post Sun. Jan. 04, 2009 10:30 am

CapeCoaler wrote:Have we asked Dean at Hitzer about the problem, a solution and how to prevent the problem from developing in the future?
If they are more than surface scratches or actual cracks no amount of 'polishing' even with compound is going to cure the problem.
If it is just scratches then polishing will be the answer, just what kind of compound.
I haven't (yet) contacted Dean or Robax, for that matter, but will. I'm pretty sure these are cracks rather than scratches. People (as documented on the Glass Cleaner thread) have used carnauba wax, and ceramic polish (for Corningware surface cookstoves) for cleaning/anti-clouding purposes, but not sure whether they might not work here to fill in the micro-cracks, even if they don't polish them out.

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gambler
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Stove/Furnace Make: Leisure Line
Stove/Furnace Model: Pioneer
Location: western Pa

Post Sun. Jan. 04, 2009 11:14 am

Ashcat, The spider web cracks are there to stay and do not hurt anything.
I see you are running a 983 hand fired stove so you should have some better results with cleaning the glass. But the crazing is here to stay.
Take Care and God Bless
Rick

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Ashcat
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Posts: 420
Joined: Mon. Aug. 18, 2008 10:29 pm
Hand Fed Coal Stove: Hitzer 983
Coal Size/Type: Nut/Blaschak
Location: West Chester PA

Post Sun. Jan. 04, 2009 3:45 pm

Thanks, Rick, for the feedback.

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Millworker
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Stove/Furnace Make: Startford
Stove/Furnace Model: SC100

Post Sun. Jan. 04, 2009 4:58 pm

gambler wrote:Ashcat, The spider web cracks are there to stay and do not hurt anything.
I see you are running a 983 hand fired stove so you should have some better results with cleaning the glass. But the crazing is here to stay.
Why shouldn't people be worried about these cracks? I've always been under the impression that any material with hairline cracks is more susceptible to breaking. Why hasn't anyone recommended replacing the glass? I am posing these questions because stove door glass breaking while I am at work is one of my biggest fears. I would love to hear why this is something not to worry about.
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gambler
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Stove/Furnace Make: Leisure Line
Stove/Furnace Model: Pioneer
Location: western Pa

Post Sun. Jan. 04, 2009 5:51 pm

Millworker wrote:Why shouldn't people be worried about these cracks? I've always been under the impression that any material with hairline cracks is more susceptible to breaking. Why hasn't anyone recommended replacing the glass? I am posing these questions because stove door glass breaking while I am at work is one of my biggest fears. I would love to hear why this is something not to worry about.
I don't know for certain but I believe the crazing that you see is cracking along some grain boundaries within the material. I don't think any of this crazing comes to the surface of the glass. I have crazing on my glass and I clean it with a wet paper towel when the glass is hot so if it were going to fail it should have failed on me by now.
But you do bring up a good point. What type of glass is in your stove? If it is not the ceramic glass it may well come apart at the crazing sites.
Take Care and God Bless
Rick

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