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Old 07-21-2011 | 12:58 PM
  #26  
Zor
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Default RE: 1/4 scale cub covering


ORIGINAL: TripleDeucer

Rodney, that is exactly one of the questions I had for the Randolph rep, as maybe they miss labeled some nitrate with butyrate labels. Said no way and never offered any other help as to why I had problems with it.
I have a cupboard full of K&B epoxy, but was looking for the full scale finish. I started the job with nitrate and then switched to butyrate clear to seal the Koverall cloth. I put the nitrate away so as not to get it by mistake. Then followed up with the silver coat, white base coat and then the yellow. Everything turned out perfect and I was very happy until the first cleanup.
What was this "silver coat" ?

Zor
Old 07-21-2011 | 01:18 PM
  #27  
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Default RE: 1/4 scale cub covering

Simulated UV protection.
Old 07-21-2011 | 02:33 PM
  #28  
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Default RE: 1/4 scale cub covering


ORIGINAL: TripleDeucer

Simulated UV protection.

Yes, I knew that is why you applied it.

I wonder about the type of product and how it may have affected the dope.

Most any paint can go over the dope but the dope does not like to be applied over some type of products.

For example dope should not go over latex or over some oil based paints.

I did not observe such situation as you described by using just butyrate over nitrate.

Zor
Old 07-21-2011 | 02:39 PM
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Default RE: 1/4 scale cub covering

The silver coat was Randolph butyrate dope just like the rest.
Old 07-21-2011 | 03:02 PM
  #30  
Zor
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Default RE: 1/4 scale cub covering


ORIGINAL: TripleDeucer

The silver coat was Randolph butyrate dope just like the rest.
Thanks for the reply TripleDeucer,

These situations as you experienced are mysteries that contribute to make this hobby so fascinating.

I wonder if anyone else has hada similarexperience as you have had.

Personally I did not.

Zor



Old 07-21-2011 | 05:01 PM
  #31  
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Default RE: 1/4 scale cub covering

ceconite is a "shrinking" covering. it is usualy shrunk using a heat-gun. buterate dope finishes the shrink. i use it on all my models and recovered my full size stearman and a clip-wing cub with it. very few use cotton or linen any more.
Old 07-23-2011 | 12:27 PM
  #32  
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Default RE: 1/4 scale cub covering


ORIGINAL: fred985

ceconite is a "shrinking" covering. it is usualy shrunk using a heat-gun. buterate dope finishes the shrink. i use it on all my models and recovered my full size stearman and a clip-wing cub with it. very few use cotton or linen any more.
Yes fred985 but I do not heat shrink it on my models due to the relative weakness of the balsa structures.

I just let the butyrate dope do its job and it thightens real well for years to come.

Zor

Old 08-06-2011 | 05:42 PM
  #33  
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Default RE: 1/4 scale cub covering

Ok, I have a CG 1/5.5 (18%) J-3 Cub that needs covering. As of now, my plan for covering is to paint the perimiter of the model with nitrate dope and then try to lay down the koverall while its still wet. If I can't get the Koverall down before the dope dries, I will use dope thinner to "reactivate" the dope to attach the koverall. I will then paint 2-3 coats of dope over the koverall, spray a couple of coats of rustoluem primer over that sanding between coats. After that I would spray on a few coats of rustoleum cub yellow (the kind that comes in quarts), and if I am satisfied with the coverage I will spray on some rustoleum automotive clearcoat to add to the durability and degree of fuel resistance. If there is anything wrong or unpractical with my plan or even a better way to use the sig Koverall, please let me know. BTW, I notice you guys discussing painting butrate dope over the nitrate dope to fuel proof the plane. If this is true, could I paint butrate dope over the Rustoluem to fuel proof the plane instead of automotive clearcoat?
Thank you very much, Phillip

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