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  #21  
Old 05-02-2015, 04:38 PM
SuperCubDriver SuperCubDriver is offline
 
Join Date: Feb 2011
Location: Germany
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When I built my RV-7 I was searching for a good primer and did some tests. The best were the Epoxy Primers. I had one to mix by myself and spray, good product but hard to clean the spray gun, lots of work. Then I found a 2K Epoxy Primer in a rattle can very similar as described here. There is also an activation button and once activated it should be used within four days. Very easy, very clean and very tough staff - but expensive. I use it again on my -8 build.

And yes you should prepare enough parts to use the complete can. And yes there is the occasional part which is not primed. I usually did not use the can completely, so I was able to spray these leftover parts and some areas which were not perfect a while later or the next day. It was dry very soon and hard after one day and ready for riveting.

The primer coat will be damaged with the bucking bar, but it is more a cosmetic thing. The rivet guns are hitting hard and even bare metal is damaged. I found taping the bucking bar over except for the area in contact with the rivet helps.
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  #22  
Old 05-02-2015, 06:06 PM
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flyingriki flyingriki is offline
 
Join Date: Sep 2008
Location: California
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Just curious, I have a hangar neighbor that's been in the aviation sheetmetal business for over 40 years. He is a metal master with the tools and work requests to back it up. Am watching him rebuild several aircraft, a C-421, two T-6s, a Pitts, etc. etc.
All parts are either fabricated from scratch or cleaned then simply primed with green stuff like most everything I see in metal planes. What's wrong with that?
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  #23  
Old 05-02-2015, 07:00 PM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
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Quote:
Originally Posted by flyingriki View Post
Just curious, I have a hangar neighbor that's been in the aviation sheetmetal business for over 40 years. He is a metal master with the tools and work requests to back it up. Am watching him rebuild several aircraft, a C-421, two T-6s, a Pitts, etc. etc.
All parts are either fabricated from scratch or cleaned then simply primed with green stuff like most everything I see in metal planes. What's wrong with that?
I like it. Zinc chromate primer - that is what I used. Not a good top coat, but good corrosion resistance when scratched. If I did it again, I might just alodine and leave it that way. It gets into all the crevices.
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