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Author Topic: Question: Why does the paint come off my firebox?  (Read 4070 times)
Gator Ritch
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Question: Why does the paint come off my firebox?
« on: September 22, 2009, 03:52:14 PM »

This question is asked repeatedly.  High heat BBQ paint doesn't not have any elasticity.  It can't stretch out and then compress itself back into place.  What occurs to your firebox when heat is applied?  The steel will expand when heated and then contract as it cools.  This is what causes the paint to "flake" off.  Not "burn" off, although usually referred as that.  Also the reason that this occurs on the firebox end and not the food chamber.  The firebox is twice as hot as the food chamber.  Example, your firebox can run upwards of 500 degrees to maintain 225-250 degrees in the food chamber.  This isn't even close to the temperatures that most hight heat paint can resist.  Most are 800 to 1200 degrees resistant.  

Now, over time, as a pit seasons, the firebox will have a tendency to not expand and contract as much as it did when it was new.  Thus, continously repainting will be less frequent.
« Last Edit: October 03, 2009, 07:54:10 AM by Gator Ritch » Logged

Ritchey Robin
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DarylCincy
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Re: Question: Why does the paint come off my firebox?
« Reply #1 on: September 22, 2009, 04:15:42 PM »

Ritch I'm with just seasoning the outside of the whole firebox with peanut or veg oil and not worrying about the paint staying on. I think that should just be a order option without paint just oil. I would have just ask you to oil the firebox down for me and then there would not be no work later with the wire brush.
Just oil folks an not worry!
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DarylCincy
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Gator Ritch
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Re: Question: Why does the paint come off my firebox?
« Reply #2 on: September 22, 2009, 04:54:38 PM »

That will take care of it.   Thumb
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Ritchey Robin
Pit Designer and Manufacturer
Gator Pit of Texas
11161 West Little York
Houston, Texas 77041
Toll Free: 1-866-869-5166
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Email: info@gatorpit.net
Voted "Best Mobile Barbecue Pit" Houston Pres
serialgriller
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Re: Question: Why does the paint come off my firebox?
« Reply #3 on: September 25, 2009, 09:20:43 PM »

i pretty much oil my fire box down every cook.  every now and then when there's been one too many adult beverages involved, i'll skip it, but that's pretty rare.
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Re: Question: Why does the paint come off my firebox?
« Reply #4 on: December 19, 2009, 09:08:17 PM »

i pretty much oil my fire box down every cook.  every now and then when there's been one too many adult beverages involved, i'll skip it, but that's pretty rare.
    
At the beginning of the cook or the end Huh
what temp and how do you apply I used a sop mop today on my thin wall Brinkman which I now refer to as my grate holder and lump coal maker
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serialgriller
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Re: Question: Why does the paint come off my firebox?
« Reply #5 on: December 22, 2009, 10:35:09 AM »

at the end of the cook.  not sure of the temp, but the firebox has cooled down quite a bit.  sometimes i will brush oil on with a foam brush, more often than not, i find myself just spraying it down with Pam.
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Zilla
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Re: Question: Why does the paint come off my firebox?
« Reply #6 on: December 22, 2009, 10:50:13 AM »

I have an additional theory to add to what Ritch said.  New pipe has a fair amount of oil/grease/grime and oxidation (rust) on the surface from it's manufacture.  Even though the crew at Gator Pit does it's best to clean this off with sanders and a thinner wipe down, there is no way that all that stuff is coming off.  When you heat that firebox up not only does it expand but the oil on the surface of the pipe deep in the pores of the steel begins to boil off.  This also loosens some of the left over grime in the pores and adds to the paint problem.

In a perfect world Ritch would have 24hr free labor and could degrease the pit by hand and then fire the pit up before painting it until all of the oil was burned out and then he could clean the coals out of the firebox, wipe the pit with thinner again and paint it while it was still warm, >200* perhaps.  The paint would probably adhere much better but then none of us could afford one of his pits!  Angry

I'm just guessing though........... brow 
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serialgriller
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Re: Question: Why does the paint come off my firebox?
« Reply #7 on: December 23, 2009, 01:06:15 PM »

probably be cheaper to have it powder coated.........     Smiley
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