Kroil and heat on barrel camo finish

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irafikov

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Hi Guys,

Do you think that Kroil penetrating oil can damage shotgun barrel camo finish if left for a long time?

The reason why I am asking is I need to remove stuck choke from that barrel.

My plan is submerge end of the barrel where I have chock in Kroil oil with about an inch over chock level. This way oil will have two points of access to work with, from top and bottom. I would leave it for couple of weeks for Kroil to do it’s job.

After two weeks, my plan is to heat up barrel with heat gun and try to remove chock again.

My worry is that Kroil oil will penetrate between camo finish and barrel. Which in turn will chip away the finish.

Let me know what you think and if you have done it before.

I am also open to other ideas on how to remove stuck choke.

Thank you for your help in advance.

Regards,

irafikov
 
I have removed stuck chokes using a wine cork and masking tape. Tightly wrap the masking tape on the outside of your barrel. Run parallel strips down the Rib and wrap strips to the parallel ones on the side of the rib. Mearure how long your choke is and push the wine cork slightly below the bottom of your choke. I used the modern ones that arent cork and theyre extremely tight so no leaking. This is in a 12 gauge. I then put the barrel in a padded jaw vice but any method that holds it secure and plumb will work. Just fill it with the Kroil to the very top. Two or three times a day run a small bead around the top of the barrel where the choke ends. If this doesnt work your the proud owner of a fixed choke gun.
 
I wouldn't do it. Kroil will probably severely damage that finish.

I used Kroil to clean some Lee Enfield No. 4 rear sights, and it melted away whatever white paint was in the sight marks.

It also ate the chrome or nickel finish off of some Yugo 8mm strippers clips that I left coated in it. FWIW, similar strippers clips coated with WD-40 suffered no harm whatsoever.
 
Longstud said:
I have removed stuck chokes using a wine cork and masking tape. Tightly wrap the masking tape on the outside of your barrel. Run parallel strips down the Rib and wrap strips to the parallel ones on the side of the rib. Mearure how long your choke is and push the wine cork slightly below the bottom of your choke. I used the modern ones that arent cork and theyre extremely tight so no leaking. This is in a 12 gauge. I then put the barrel in a padded jaw vice but any method that holds it secure and plumb will work. Just fill it with the Kroil to the very top. Two or three times a day run a small bead around the top of the barrel where the choke ends. If this doesnt work your the proud owner of a fixed choke gun.
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I love your idea. Thank you! I really like to get more info on how you do it. I will post a picture of how I understood it. If you can, please give me more details, that would be amazing.

How long do you do it for? I am not in a rush so can take as much time as I need

On your last step “ run a small bead around the top of the barrel where the choke ends”. Do you soak bead in Kroil and then apply small amount on top?

I understand that masking tape is for finish protection. But you use it a lot with several layers. Can you let me know what’s your thoughts about it and on what step masking gets to do it’s job?
 
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Never had a choke tube get to that point, but based on other frozen metal parts I would have thought that heat would crack the problem, or failing that, cold. Not talking about heating the barrel red hot, start out with gentle heat from a heat gun or propane torch and increase it a couple of times with removal trials between each one- you will have to be reasonable about how far you take it but imagine the heat from shooting say 100 rounds, it could safely get quite hot. Cold might be safer re discolouration, put the barrel in the freezer. Hot or cold, what you're hoping for is a different rate of expansion between the two metals or alloys that will also crack the baked-in oil that's undoubtedly in there and has turned to varnish. Next time get some anti-seize compound and apply that on the choke threads before inserting.
 
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