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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Body - Exterior> aviation primer / base coat compared to auto primer / base coat
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Topic Review (Newest First)
04-21-2013 10:58 AM
tresi
Quote:
Originally Posted by stroker_SS View Post
Are you saying there's a way around applying alodine after getting down to bare aluminum?

I'd love to know because alodine is such a PITA in some area's, and they're too cheap at work to buy the no rinse alodine markers.
Well, 98% of my aviation career has been in some form military aviation. Most of it being in Army contracts. While the army has been having to become more up to speed the Airforce and Navy get all the new stuff. I sure in the manufacturing sector there are ways of getting around alodine as of 6 years ago when I got out of it alodining bare spots was still the standard. This week a buddy of mine was repainting his featherlite car hauler he got from the "Snake". We found alodine under the paint on it so it's not just an aviation standard.
04-21-2013 10:07 AM
painted jester
Quote:
Originally Posted by stroker_SS View Post
Are you saying there's a way around applying alodine after getting down to bare aluminum?

I'd love to know because alodine is such a PITA in some area's, and they're too cheap at work to buy the no rinse alodine markers.
I hung around Bellville a lot as a boy and in my teens!! I worked for Flying Tigers and British Airways at Metro for a spell in the 70s and would take Zinc oxide home to use on my hot rod frames LOL!!!

Stroker, I was a member of the Piston Pushers down there years ago!
And had my horses at Circle K Ranch in the 60s!

We used Alodine on the Rolls Royce Parts when I was at "Antique Motor Car" (Plymouth Mich) in the 70s and then used Zinc oxide.

Jester
04-21-2013 08:10 AM
stroker_SS
Quote:
Originally Posted by tresi View Post
Old school ways was alodine followed by a coat of zinc cromate primer. Now days there are various epoxy primers for the job.
Are you saying there's a way around applying alodine after getting down to bare aluminum?

I'd love to know because alodine is such a PITA in some area's, and they're too cheap at work to buy the no rinse alodine markers.
04-20-2013 11:38 PM
tresi Another A+P here, not all auto paints stick well to aluminum. Aircraft grade aluminum should not be sanded like auto sheet metal. Aircraft aluminum is a high strengh alloy but the alloying agents lower it's ability to resist corrossion so it's clad in a very thin layer of pure aluminum. This thin layer should not be sanded to to the chance of sanding it off. This leaves a surface that is more difficult for paint to stick to. Old school ways was alodine followed by a coat of zinc cromate primer. Now days there are various epoxy primers for the job. Also todays aircraft paints are much more resistent to chemical attack. This is more important than you might think on an airplane.
Saying this I've seen several light aircraft painted with centari, delstar or what have you. Once you step up from puddle jumpers imron is about the only thing automotive paint that is likey to be found on an airplane. With all the extra work involved with painting an aircraft not using a paint that is up to the task is false economy.
04-20-2013 11:35 PM
1Gary Got me wondering because most planes are aluminum and most cars aren't,if that alone makes a difference in the kind of primers??.

Former Opps agent Burlington Air Express.
04-20-2013 11:11 PM
dogwater OWell the way I look at it 1. He made his money by being a bank manager,the sort of person that makes me .... I wouldn't say it..... 2. This is airplane no.2 but I must admit that plane no. 1 is just a crop duster w/o the spraying gear. It kind of cool cause you can steer it into a strong headwind an make the plane just float in the air. 3. I'm the black sheep of the family, I have to plan ahead if I'm buying paint. I was wanting to be able to say, you spended way to much on paint. I used to like those ads on TV when they would push the banker looking guy into the bull ring......Damm its late, I gota go memes.
04-20-2013 11:01 PM
stroker_SS I'm an aircraft mechanic, I typically only do touch up painting though. The criteria the paint must meet varies by the airframe manufacturer and is called out in the aircraft maintenance manual under the approved materials listing.

At work we only use one type of primer on all aircraft and that is PPG aerospace " super koropon" fluid resistant epoxy primer. There are other primers approved, but not commonly found for whatever reason. The color coat however varies based on the aircraft's owner but 90% of them use Sherwin-Williams jetglo, the rest use a variety of DuPont and ppg products.
04-20-2013 10:11 PM
69 widetrack
Quote:
Originally Posted by dogwater View Post
Is their a differants between aviation an auto 2K paint ? Seems as though I pissed off my older brother telling him that he F up buying paint for his new airplane.He said that paint is expensive for his toy, but not knowing on my part that their is a diff in aviation paint I told him he needed to shop around an not buy the most expensive paint money can buy an complain about it. So can one use 2K on a plane that might go 25 thousand ft. I don't know how high it can go, but its not pressurized.
I'm not an aviation paint specialist, but what I do know is that often paints for this type of industry is often spect by the manufacturer and must meet certain criteria before it can be applied on any air craft. This the same in the boat building industry and if the paint your representing is not one that is spect for that particular craft, you need to jump through many hoops to have that product used.

Now that being said, when I was a PPG Rep, the paint I was representing was spect for a helicopter manufacturing company. It was an industrial line of PPG paint and the prices where not astronomical. Now, when I say that the paint wasn't astronomical in price, that doesn't mean it's cheap, it just isn't something that is way out of line in comparison to automotive refinish paints.

To answer your question, your brother's hands may be tied, if the paint spect for his aircraft is of the expensive variety, he may not have a choice...if he wants to fly the plane.

Hope this helps.

Ray
04-20-2013 09:56 PM
dogwater
aviation primer / base coat compared to auto primer / base coat

Is their a differants between aviation an auto 2K paint ? Seems as though I pissed off my older brother telling him that he F up buying paint for his new airplane.He said that paint is expensive for his toy, but not knowing on my part that their is a diff in aviation paint I told him he needed to shop around an not buy the most expensive paint money can buy an complain about it. So can one use 2K on a plane that might go 25 thousand ft. I don't know how high it can go, but its not pressurized.

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