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Priming Questions from A Prospective Builder
To prime or not to prime?
That is the question at hand, from what I can tell this is a controversial subject. What are your opinions? Is it worth it? Additionally im looking at building in a 2-car sized detached garage at home, I don't have room for a paint booth without building something (possible). Trying to determine if its worth it to prime and if it is, how I will do so in a reasonable manner. It seams that proper primer with the air gun and all is the way to go but this sounds like a lot of extra cost especially when I would have to build a paint booth. Any and all advice is welcome! |
Your answer lies in the 331 threads dedicated to the subject in the "never ending debate" section of this forum.
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The experiences of folks with corrosion in your area, especially at local airports, will tell you if you need to prime or not.
In a dry area you probably don't. In an area where there's more moisture or industrial pollution, maybe you should. Dave |
You can prime outside (open air no paint booth required).
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Prime
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Whatever you choose, spray it light. Paint weight adds up quick. Especially in the tail. You only need a thin layer to protect for a very long time. That's why I chose P60G2. If you prime, buy a good respirator or a Hobby Air positive pressure system. If you prime, research surface prep. No primer will do it's job if the surface is not properly prepped. |
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Here is an article on priming I wrote in 1997 when I was building my RV-6: http://home.hiwaay.net/~sbuc/journal/priming.html Flash forward to 2020.....I still fly the RV-6 and it shows no evidence of corrosion. Take this as one datapoint. :) Best wishes for a very enjoyable journey! |
As others said. Sam has a great web site. I am a fan of primer. There are areas you MUST prime. Most areas are optional.
My advice is pick a good aerospace brand of primer AkzoNobel, PPG, Sherwin-Williams for example. Brand not important, but would pick one with a local distributor you can buy direct. You will need etching and alodine solution as well. You will mix the primer stuff two part, and use a cheap spray gun is fine. The good stuff is expensive, but it will do the whole plane. Rattle can is more expensive by ounce and inferior protection. Second advice paint in batches. Prime a bunch of parts all at one time. You can prime parts you have not fitted and touch up as required. It will save time. Setting up to prime takes time. Last this is hazardous to health. Wear good breathing protection in well ventilated area. I am not kidding. :eek: (PS you do NOT have to put it on thick) |
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I also like this sprayer from 3M. https://www.amazon.com/Accuspray-165...2312071&sr=8-4 Disposable cups and ends and cleanup is easiest ever! Won't give a car like finish, but it's primer. |
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http://myrv14build.blogspot.com/p/priming.html http://rvplane.com/priming/ I like these methods as they avoid having to deal with the alodine. Anyone have any experiance with them? |
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