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Fish Eye Update

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notsew_evets(at)frontiern
Guest

Posted: Tue Mar 11, 2008 7:40 pm Post subject: Fish Eye Update

So your thinking about painting your own  airplane.  Good idea.   I m old, stubborn and sometime a  whiner.

 I ve had fish eyes appear from the very first time  I pulled the spray gun trigger.   Thanks to you guys and other  builders,  I ve learned the hard way about painting aluminum  airplanes.

 I knew about making sure the air coming from the  compressor was dry and clean.  I knew but being stubborn, I knew more than  YOU....

 OK,  I confess I m a stupit dumb  poop.   I purchased a filter ( inline) from Harbor Freight.  It  looks good but I still had fish eyes all over the painted  surfaces...

 Yesterday I went to home Depot and bought a better  quality oil.water separator (filter) AND a new air hose.

 Today I painted a wing.   AMAZING!   Its very nice (not perfect) but no fish eye.....

 After painting I cleaned up everything and went  over to the new filter.   Man O man,  I could see extremely small  oil droplets.  I mean small.  Not a pin head size but a pin  point.  Hardly visible but black as coal..

 That's it....OIL...

 Black gold.

 If I had not been so stubborn and really  listened,  I would not have wasted $400 worth of paint and saved hours of  sanding and repainting....

 If you do the painting yourself it will be  rewarding.  Just don't do like me and try to reinvent proven work  practices.  

  

 Steve

 Owner:  Steves Aircraft Painting  Service.   NOT!

  

    [quote][b]

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AV8TOR09

Joined: 27 Feb 2007
Posts: 2
Location: Halifax VA

Posted: Fri Mar 14, 2008 11:38 pm Post subject: Re: Fish Eye Update

Glad to see that you found the culprit ! One other cause you might want to be aware of concerning fish eyes is silicone. I used to do backyard custom auto paint jobs and the guy I used to work with absolutely forbid any kind of silicone based lubricant to be anywhere near the garage. We were painting a 69 GTX when it started to fisheye and we couldn't figure out why. Then we noticed the owners friend was ARMOURALL'ing his tires outside the garage which was at least 50 to 60 ft away from our intake air screens but that was still to close. Long story short, high dollar custom paint job ruined and garage permanently contaminated.  Customer paid for paint job twice, after all he bought his friend with him!

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notsew_evets(at)frontiern
Guest

Posted: Sat Mar 15, 2008 8:37 am Post subject: Fish Eye Update

Well I thought I had it all solved.  Then AGAIN yesterday the fish eyes came 

to my spray booth....

I ve added two inline filters, new hose and cleaned the primer surface 

really well..   I now think that I somehow got contaminates in the primer 

coats.  When I apply the finish paint it comes thru and produced the eyes.

So today the battle will continue.  More later..

Steve

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AV8TOR09

Joined: 27 Feb 2007
Posts: 2
Location: Halifax VA

Posted: Sat Mar 15, 2008 5:15 pm Post subject: Re: Fish Eye Update

Steve

  Sorry to hear you are still having problems. I re-read your initial post and I did not see where you used a silicone/grease/wax remover prior to painting. I do not have alot of experience painting aluminum but I have painted dozens of cars and we used PREPSALL 900 as a final wipedown on every job. We would spray mist it on and wipe of with lint free rags then do a final tack rag wipe and spray away. We never had a problem with fish eyes except the one time described in the previous post. That was caused by silicone being introduced to the paint finish as we sprayed from an outside source. 

  You might want to check compatibility with your paint products before using a PREPSALL type product. We never had any issues with it and it worked great. A good thing to remember (I think SKYHAWG pointed it out earlier) is that you can not be too clean or careful in your prep and paint work. Always use some sort of disposable latex/nitrile/etc..gloves and dont touch the cleaned surface with anything after being wiped down. The grease from your fingers can and will show thru your paint.

  I hope you find whats causing your problem, maybe this will be some help to you, GOOD LUCK!!

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lrm(at)skyhawg.com
Guest

Posted: Sat Mar 15, 2008 6:22 pm Post subject: Fish Eye Update

The only way you now can get a decent paint job is to either strip it all 

off, start over or lightly sand out you eyes, add a generous amount of fish 

eye additive and give it another final coat.   My experience which is a lot, 

is that paint with fish eye additives will last as long as any others. All I 

can do is lead you to the water, the drinking is up to you.  LRM 

www.skyhawg.com.

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