Mark C.

Its a huge mix from knowing a lot to clueless-like putting a teapot on open flame ( and breaking it the day he bought it) to heating bake ware up with oven and lasting decades. 
The public is  a petri dish of good bad and the down right clueless
As I slow it down  with the public I will never miss the clueless ones.Only the ones who are aware .

I did a demo workshop on about 8 of the wispers-they are quiet and thats all they are -they can be slowed down easy with a medium amount of clay and the splash pans are cheesy and will break over time. The cords are to light duty as well. Thats my take-oh ya they do not have good fast service/parts like Brands made in this country 
a pancake motor is like Naan bread only made on a charcoal fire a low heat-when done its a low torque flavor that is really quiet and small

It works on both but best on bisque- If the item is green use your own clay fines to fill the crack. (mix your own clay fines with a bit of vinagar and water and fill greenware cracks. I fill the crack once bisqued and let it dry and sand it smooth then glaze. The line (where it is) is white so I usually cover with a dark glaze. This product works well but do not expect miracles .I never rebisque it -just let it dry sand smooth glaze and fire.If you need to glue it on use Aztec high fire cement. Mix it with your own clay body in small doses.
Used  Bisque fix for many many years. They once made a greenware fix but took it off market years ago-that stuff was great .
I also use it a filler in a say a hole or chip missing piece. Good stuff but the price went up recently like all things.

Hard work usually pays off  they say. Most folks are not focused enough to go thru the lean years and keep at it.It takes a long time to gain traction in this field and it takes a long long time to become a professional at all things needed to make it work.If you think its work you are in the wrong field -it has to be your passion I feel.

I did wood shop and metal casting in Junior High (7-9th grades)now called middle school I think? sewing and typing was high school for sure.
In collage we had home economics and wood shop and auto repair (I took none of that )as I was 110% into ceramiucs /art major. 
I can from a family that made stuff and art was also in that mix so it was learned at home -surfboards from Balsa wood in the 50s and aluminum skateboards made with steel skates (before better wheels and wood tops).  Worked on Bicycles and mini bikes then go carts then cars. Was into wood work as a young boy and fiberglass as well. Pained my bike fram in 5th grade after stripping it down. School had programs then like shop and art as this was before Reagan killed the educational budjet for our state. Back when stuff with hands was common practice.
Now its all gone . Cal went from #1 in education (back in the day) to #37 in the Forbes Mag scale this past year. My mother taught Home economics in high school and collage for 35 years. I have little more than most in terms of this exposure.

Hard work usually pays off  they say. Most folks are not focused enough to go thru the lean years and keep at it.It takes a long time to gain traction in this field and it takes a long long time to become a professional at all things needed to make it work.If you think its work you are in the wrong field -it has to be your passion I feel.

I did a demo workshop on about 8 of the wispers-they are quiet and thats all they are -they can be slowed down easy with a medium amount of clay and the splash pans are cheesy and will break over time. The cords are to light duty as well. Thats my take-oh ya they do not have good fast service/parts like Brands made in this country 
a pancake motor is like Naan bread only made on a charcoal fire a low heat-when done its a low torque flavor that is really quiet and small

I did wood shop and metal casting in Junior High (7-9th grades)now called middle school I think? sewing and typing was high school for sure.
In collage we had home economics and wood shop and auto repair (I took none of that )as I was 110% into ceramiucs /art major. 
I can from a family that made stuff and art was also in that mix so it was learned at home -surfboards from Balsa wood in the 50s and aluminum skateboards made with steel skates (before better wheels and wood tops).  Worked on Bicycles and mini bikes then go carts then cars. Was into wood work as a young boy and fiberglass as well. Pained my bike fram in 5th grade after stripping it down. School had programs then like shop and art as this was before Reagan killed the educational budjet for our state. Back when stuff with hands was common practice.
Now its all gone . Cal went from #1 in education (back in the day) to #37 in the Forbes Mag scale this past year. My mother taught Home economics in high school and collage for 35 years. I have little more than most in terms of this exposure.

As a potter one should have an understanding of materials and thier use. In terms of safety and use
Not everything in life comes with a warning label.
This is spoken from an old codger
 

ah the joys of electric kiln loading and unloading.
As a potter for 50 years now I thank my lucky stars I made myself a car kiln in 78-an electric would have killed me by now.
Nobody ever addresses this part of the electric kiln dilemma much-lower back issues
 

As a potter one should have an understanding of materials and thier use. In terms of safety and use
Not everything in life comes with a warning label.
This is spoken from an old codger
 

As a potter one should have an understanding of materials and thier use. In terms of safety and use
Not everything in life comes with a warning label.
This is spoken from an old codger
 

As a potter one should have an understanding of materials and thier use. In terms of safety and use
Not everything in life comes with a warning label.
This is spoken from an old codger
 

Its ceramic fiber as asbestos is not as high heat as one might think.
Ceramic fiber is what you have there.It's held up with a button system.

I am a cone 10 lifetime potter. The cone 6 is a bit less in gas  true but fluxing issues and materials to do that also play into costs as they cost more. I personally feel its easier glaze wise to fire cone ten. The choice of clays is larger as well and the clay costs a tad less. But i'm not a cone 6 potter.
Many here are electric cone 6 potters and if its an electric kiln cone 6 makes more sense. 

Wet electronics are no good so some mild dry heat is needed. Thats an electronic contoller on the side. You could pull the cover off the electronics and spray with electronic cleaner (spray made for this). I do that when I have wet underwater electronics  that get wet diving.
Some oil on the rusting steel would also help. Dry the bricks well before firing.
the top is open to rain on the electrical side so get into that and take a look.

I think its a all around bad idea. You do not eat off the stone. Why would you put food on that sealer.
You can as Min said have it tested but why bother its not a food sealer. Good money after bad in my mind-let us know what the results are when the lab report comes back.
 
 

ah the joys of electric kiln loading and unloading.
As a potter for 50 years now I thank my lucky stars I made myself a car kiln in 78-an electric would have killed me by now.
Nobody ever addresses this part of the electric kiln dilemma much-lower back issues
 

I did wood shop and metal casting in Junior High (7-9th grades)now called middle school I think? sewing and typing was high school for sure.
In collage we had home economics and wood shop and auto repair (I took none of that )as I was 110% into ceramiucs /art major. 
I can from a family that made stuff and art was also in that mix so it was learned at home -surfboards from Balsa wood in the 50s and aluminum skateboards made with steel skates (before better wheels and wood tops).  Worked on Bicycles and mini bikes then go carts then cars. Was into wood work as a young boy and fiberglass as well. Pained my bike fram in 5th grade after stripping it down. School had programs then like shop and art as this was before Reagan killed the educational budjet for our state. Back when stuff with hands was common practice.
Now its all gone . Cal went from #1 in education (back in the day) to #37 in the Forbes Mag scale this past year. My mother taught Home economics in high school and collage for 35 years. I have little more than most in terms of this exposure.

Lithgow is a town in the Central Tablelands of New South Wales, Australia -just googled it

Its ceramic fiber as asbestos is not as high heat as one might think.
Ceramic fiber is what you have there.It's held up with a button system.

Wet electronics are no good so some mild dry heat is needed. Thats an electronic contoller on the side. You could pull the cover off the electronics and spray with electronic cleaner (spray made for this). I do that when I have wet underwater electronics  that get wet diving.
Some oil on the rusting steel would also help. Dry the bricks well before firing.
the top is open to rain on the electrical side so get into that and take a look.

It’s a bad idea to overfire bisque ware

You could spin it  using with some fine  emory cloth to smooth it if its rough. I really think its no big deal. Looks like it will not affect function at all.

Since its an inside form and dries away from form-I would go with pure mold lube from axner-its not oil based and its easy . I use it on a curved plastic tray sushi form and add a round thrown foot. You could also use plastic  wrap in lower part so oil is not ever put on that part of clay. The oil is an issue so do not use it at attcahment spot