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Permalink Reply by Mark Maltais on October 10, 2013 at 2:59pm

I used self etching automotive primer on most steel parts that I've painted so far that are hidden (mixer, flaperon rods, etc.) and found it works great.  Very resilient.  Doesn't chip or flake and gives a solid base for the paint to adhere too.  Bit expensive... a decent "rattle" can of this stuff is about 15$ or more.

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Permalink Reply by Elijah Lewis on October 10, 2013 at 9:10pm

When I was building RV's I used a lot of Dupont Veri-Prime self etching primer. It works well but not in a rattle can, it is 2 part and has to be sprayed or brushed. Its also super expensive. I'm going with Duponts rattle can version of self etching primer for the 750 and it seems to be working good for the little that I am using. $25.00 a can locally.

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Permalink Reply by Ed G Novak on October 10, 2013 at 11:33pm

I am already using self etching on internal stuff, im talking about painting the entire airplane

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Permalink Reply by Elijah Lewis on October 11, 2013 at 6:22am

I used DuPont veri- prime on my last 2 builds with no problems.

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Permalink Reply by Dan Dempsey on October 12, 2013 at 7:34pm

I've used it by the case on my plane.  After I've deburred the holes,  I rub all the mating surfaces with scotch bright.  Wash them off with laquer thinner then spray on self etching primer.  Seems to work good.

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