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Building Tips and technical articles. => Paint and finishing => Topic started by: Motorman on January 29, 2016, 07:03:16 AM

Title: Nitrate Shelf Life
Post by: Motorman on January 29, 2016, 07:03:16 AM

My Sig Nitrate turned brown in the can, is that bad? I used some on a beater plane and it seemed to work.


MM

Title: Re: Nitrate Shelf Life
Post by: dennis lipsett on January 29, 2016, 02:01:18 PM

I've seen nitrate dope completely brown and dried out in the can. it was revived with thinner? and used apparently with no problems.

Dennis

Title: Re: Nitrate Shelf Life
Post by: billbyles on February 01, 2016, 09:56:16 PM

Quote from: Motorman on January 29, 2016, 07:03:16 AM

My Sig Nitrate turned brown in the can, is that bad? I used some on a beater plane and it seemed to work.


MM

When nitrate turns amber or brown that indicates it has become more acidic than it should be.  It is a reaction to the metal in the can and air.  I would not use it for a full-scale airplane cover job but you may well get away with it using it on a model.