From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [LML] Flying in primer question
To: lml
Date: Fri, 02 Dec 2005 18:16:29 -0500
Message-ID: <web-861178@logan.com>
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Posted for "John W. Cox" <johnwcox@pacificnw.com>:

  Jon, understand that primer which is porous by design, will be exposed
  to hydrocarbons and organics in flight.  After the fly-off period you
  are considering, be sure there is enough mil thickness of remaining
  pre-flight primer to be cleaned with an appropriate cleaner and then
  thoroughly sanded again for reapplication of final primer-sealer and a
  successful topcoat.
  
  I have experienced adhesion difficulties with using either 400 or 600
  grit on primer (for exactly these reasons) in the past.  That said, if
  you sanded with either for the fly-off period and left enough thickness
  behind... you should be able to sand it down and reapply the correct
  primer for the topcoat chemistry that you select.
  
  John Cox
  
  PS - I leave the final coat to Tom Connors of Bend, OR if quality and
  appearance are the desired conclusion.
  
  > Looking for comments on the pros or cons of sanding the last coat of
> primer. I intend to fly in primer for a few months and have mixed feelings