My Home Built Gun Kote Oven


February 20, 2009, 07:27 PM
Having seen several designs on-line and not really liking any of them I came up with this;


1 4x8 sheet of "Durarock" cement board, tile underlayment, left over from my bathroom remodel - free

1 Toaster oven from the "Goodwill" store - $2.00

1 roll foil tape - $6.00

1 roll foil duct insulation - $15.00

Misc. pieces of "Pink Fiberglass" insulation.

I started by building a simple box from the Durarock, it nasty dusty stuff to cut but can be done like sheetrock if you have a sharp razor knife and some tenacity. I reccomend the former method unless you can cut it outside with a skilsaw. Build the box "Sealed", that way when you cut the door "Piece" out of it, regardless of how "Square" you built it, the door will fit perfectly. I used "Gorilla Glue" remember to moisten the places you use it for a proper cure and some pre-drilled #6 1" screws.

Build the box, cut out "Door", but secure "Door" with some hinges before cutting it completely "Off" of your rectangular "box", this way you wont have to fight keeping it alinged to secure the hinges.

I removed the "Guts" of the toaster oven, salvaging the temp control resistor and the "Elements". I added a "Oven" light and a 120V computer type fan I had laying around for some ventilation.

Once you have the door hinged go ahead and "Wire" everything up, the insulation will protect and cover it. I put a piece of the foil tape over the wiring to keep it in control until I had the box "Wrapped". The Pink Owens Corning insulation seems to be pretty high temp stuff, I pulled a wad off and hit it with a propane torch, it had ZERO effect on it, good enough for me! Using some thin wire I secured the pink insulation on the "Box" and then covered that with the "Duct Insulation" I got at Home Depot. I secured this over the pink stuff with Foil tape.

I am very happy with the results! It takes 8 minutes to go from 42 deg (Garage temp without heater on) to 350 deg. with vent fan running! I dont have a "Thermostat" , I just dialed down the temp a tiny little bit at a time until the desired "on" temp (350 deg.) was achieved. I added the little "Control Box" and switches for Fan, Light , element on/off for the fun of it, you could do it simpler if you desired and just plug it in/out for an on/off.

Ah, they say a picture is worth a few words so here ya go! I cant wait to bake a gun in it! Ha Ha! Actually I am repainting my metal lathe so I will do a few non-gun parts in Gun-Kote for durability. I put two thermometers in it, one at the top of the box, the other at the bottom. the bottom one is useless and I plan on moving it up towards the middle, its shown on the bottom of the photos and the probe for the "LCD" thermometer is up towards the top of the unit.

You can see that I used some aluminum angle iron to "Stand off" the toaster oven elements. The wiring is easy, dont let the toaster oven confuse you. On a three wire power cord, black, white and green , one side of the elements goes to the black wire with the manual heat control in line with it, the white wire goes right to the white wire. (This is without the on/off switch), totally disregard the green one, its an extra to keep the refrigerator from shocking you when it wont automatically defrost...Wink Wink

I wont to into a lesson on basic wiring here, that is elsewhere on the web. The bottom line is , you can make a decent little paint curing oven for cheap , relatively, scroungable materials you have laying around. you dont need a thermostat if you dont mind a few minutes of "tinkering" with the temp control resistor/dial. Just watch your thermometer and dial it in to your desired temp. I would guess that this thing would easily go over 425 degrees if I needed that. I had some leftover flashing I lined the inside of the oven with but you could also paint it with some spray bomb "Muffler Paint" if you had it. I just did not like the chalky, dusty nature of the bare durarock. I will be adding some removable shelves for small parts and there is a "hook" in the top for hanging a full barreled action. The interior length is 36" is 10"x10" square inside. You could also dispense with the "Oven" bulb setup, I was originally going to heat it with either 2-3 heat lamps or a "heat gun" and changed up to the toaster oven elements. A couple of electric "Charcoal" starters would be easy to setup in this box if you couldent come up with a cheap toaster oven. The "Goodwill" store had 3-4 nice ones , cheap!



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February 20, 2009, 07:34 PM
Nice job. I'm a recovering DIY junkie myself.

February 20, 2009, 07:43 PM
Man, that funny. Its mainly a impetus for buying new and different "Tools", you KNOW what I mean. Worst case is I can convert it to a fish smoker, jerky oven, fruit dehydrator...Man, I gotta get some more of them cheap toaster ovens for parts! The sickness grows...Why does this salmon taste like "Flat Black"? Uh oh, dunno...

February 20, 2009, 08:49 PM
What, doesn't your wife like you using her oven? Nothing like some pepperoni pizza with a hint of Duracoat.

Really, that is a nice job. I wonder if a propane BBQ might be made into an oven like that.

I suppose an open flame is a no no, so forget that.

Ohio Gun Guy
February 20, 2009, 08:54 PM
I think that is great.

You insurance guy wont! :D

I have all of those items (Less the oven)....hmmmmm

February 20, 2009, 09:01 PM
As an alternative to a toaster, a small hot-plate works well for stuff like this. I used one in a home-built smoker.

February 20, 2009, 09:26 PM
I am planning on using the wife's oven. Is this really not recommended? Will the odor be permanent and will I be tasting it forever on whatevers cooked afterwards?
February 20, 2009, 10:24 PM
Looks good, How does the unit sit when running. And where do you place the pieces after coating.

February 20, 2009, 10:35 PM
I am planning on using the wife's oven. Is this really not recommended? Will the odor be permanent and will I be tasting it forever on whatevers cooked afterwards?Are you prepared to buy a new one if it does? Or, maybe worse -- eating whatever comes out of it?

February 20, 2009, 11:49 PM

There is a little strap in the top of the oven, you could also put some racks in there, I did not show it here but the racks out of the toaster oven I got cheap work perfect in the oven shown. I just had to cut a couple of the "Grates" off the end of it and it sets right in there on 4 little wood screw heads I sunk into the interior. You could hang guns on a piece of uncoated wire up through the barrel, thats my plan anyways (Havent done one yet). A large nut or something like it on one end and some little mini-carbiner on the other end.

I have painted several handguns in the toaster oven before sacrificing it to the god of DIY and it worked well. I just drilled a hole through the outside and stuck a decent thermometer in there. the "Dial" showing the temp on most of these cheap toaster ovens is at best an "Approximation" , at least in my experience with the two I have tested. They are off anywhere from 15-30 degrees depending on the range you have selected. Insulating it is important,

This is important and I forgot to mention it in the original post!

I was unable to get it over 300 deg. without insulating it. This is really important I found out. I also used some hi-temp gasket seals on the door and frame to give it an "Airtight" lockup. You will find when you dismantle the toaster ovens that they too are "insulated", cheaply and minimally but insulated nevertheless..

It is "Freestanding", you could put some "feet" on it if you wanted to but the bottom of it does not get too hot, the bottom is the only uninsulated part of it! Good catch!

February 21, 2009, 12:54 AM
Are you sure thats not a time machine?

No kidding, that looks really good. You may have given me an idea for a dryer to make jerky.

February 21, 2009, 01:08 AM
Hey! This Gun Kote smells like Jerky! Hey! My Jerky smells like Gun Kote! Its a beautiful marriage! My wife: "Hey, whatcha been doing in the garage? Aw nothing honey, just building a gun oven. Wife; Great, hope youre having fun, dinners almost ready....She is so used to me doing weird stuff nothing surprises her anymore....She just smiles and nods knowingly, I think all she hears is wahh baw wank ahh wan , yes dear, love you too! Have fun!

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