alumimun oxide blasting

Discussion in 'Gunsmithing' started by bcoving, Aug 8, 2011.

  1. bcoving

    bcoving Well-Known Member

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    i have a remington 700 im going to blast a bake on finish off of and duracoat it. is there anywhere u shouldnt aluminum oxide blast besides the inside of the barrel and chamber area? can i blast inside the action or will that make the action rough?
     
  2. westcliffe01

    westcliffe01 Well-Known Member

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    You shouldn't have finish inside the action... Definitely mask any surface that contacts any moving part. Aluminum Oxide is a very effective abrasive so after blasting it will all have to be scrubbed with soap and water and brushes to make sure you get every bit of grit out, else it will wear out your action at a very accelerated rate.
     

  3. rem.xp100

    rem.xp100 Active Member

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    Since you also need it degreased; after blasting, I stand on end and ultrasonically clean in acetone - works like a charm.
     
  4. bcoving

    bcoving Well-Known Member

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    are u guys degreasing again after blasting. the duracoat people say just blow it off and paint.
     
  5. westcliffe01

    westcliffe01 Well-Known Member

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    Prep before painting is 90% of the job. Why risk the whole refinish job by skipping 1 step ?
     
  6. J E Custom

    J E Custom Well-Known Member

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    Before you blast use Play Dough to fill the interior of the action on all surfaces that touch the bolt
    because it will make the action rough and bolt operation will suffer.

    Use an ear plug in the muzzle to protect the crown.

    After blasting clean everything very well to prevent it from ending up in the finish.

    J E CUSTOM
     
  7. Gary Kaney

    Gary Kaney Well-Known Member

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    Degrease before you blast using there Tru Strip, otherwise you contaminate your blasting media.
     
  8. Hired Gun

    Hired Gun Well-Known Member

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    I am a certified or factory trained Cerakote applicator. Durakote prep is similar. The finish just isn't near as durable. A factory Remington 700 has very generous clearance between the bolt and the action. First soak in acetone for 20 minutes. Plug the muzzle and the chamber securely with rubber stoppers. Blast with 100-120 aluminum oxide thoroughly inside and out. Everywhere you want the coating and it is to your advantage to get as much coverage as possible to extend the coatings benefits everywhere you can. Cerakote has lubricating properties and it will be noticeably smoother in operation after the coating is finished. Blow it out good with dry filtered air. Preheat to 250 for 30 minutes to burn off and drive out any oils that may show up during cooking. If oil is noted you need to resoak in acetone and reblast those areas until no oil shows up when preheated. Now that you are fully oil free let it cool to room temp. Now mix up you coating and apply. I coat the bolt body, face and the lugs. Coat the action inside and out. Bake at 250 for 2 hours. Cerakote finishes at .0005" to .001" thick.

    Things on a 700 I don't coat are the trigger assembly, the trigger hanger pins and the bolt stop return spring. I dissasemble the bolt and do everything but the firing pin spring and the very tip of the firing pin. You probably could but I just don't. If the trigger hanger pins fit loose I will coat them too. Everyone raves how much smoother there guns feel once I am done.


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    Last edited: Aug 10, 2011