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  #1  
Old 06-11-2011, 07:29 PM
panhandler1956's Avatar
panhandler1956 panhandler1956 is offline
 
Join Date: Jun 2006
Location: Ohio
Posts: 1,686
Default Disaster Strikes - wing skin bent during polishing

Doesn't seem possible to damage my airplane in the polishing process, but leave it to me to find a way!

I was compounding the top wing skin (1st process in the polishing of new metal) and the polisher grabbed the corner of the unsupported outboard top skin where it butts against the inboard skin at the trailing edge. It peeled the skin back really bad (90 degrees). Luckily it didn't tear the skin and I could bend it back in place, but it has some nice creases. Any ideas on how to fix this. If I was painting my airplane I wouldn't be as concerned, but I'm polishing.

Birth marks suck! This picture was taken after the compound polishing was done.

Help....
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Last edited by panhandler1956 : 06-12-2011 at 06:42 PM.
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  #2  
Old 06-12-2011, 05:27 AM
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pierre smith pierre smith is offline
 
Join Date: Jan 2005
Location: Louisville, Ga
Posts: 7,840
Default Wow!

One of the first lessons in polishing sheetmetal, is to never let the disc go toward the edge from the outside. ALWAYS allow the disc to rotate away from the edge to free air so it's impossible for it to grab.

Unfortunately, you're not the first to learn this lesson the hard way.

Best,
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RV-10, 510 TT
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  #3  
Old 06-12-2011, 09:03 AM
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Snowflake Snowflake is offline
 
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Location: Victoria, BC, Canada
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Default

I think the only reason i've gotten away without this happening to me is that the free end is laying on the leading edge of the flap (if i'm seeing the same place I think I am). But i'm going to watch more closely from now on...
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1996 RV-6 "Tweety" C-FRBP (formerly N196RV)
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  #4  
Old 06-12-2011, 11:03 AM
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DanH DanH is offline
 
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Location: 08A
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Default

This thread, posts 25 and 26:

http://www.vansairforce.com/communit...ht=buff&page=3

Buffing metal and buffing paint are really the same thing.

You can bump out that crease with some light off-dolly planishing. Just go slow.
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Dan Horton
RV-8 SS
Barrett IO-390
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  #5  
Old 06-12-2011, 06:45 PM
panhandler1956's Avatar
panhandler1956 panhandler1956 is offline
 
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Location: Ohio
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Default Cool

Thanks Dan!
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Brent Owens
EAA Chapter 9 Tech Counselor/Flight Advisor
Columbus, OH
RV-8 'Contrary Mary' flying
N784DE S/N #82614

www.fixedwingbuddha.com
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  #6  
Old 06-13-2011, 05:31 AM
mkbb mkbb is offline
 
Join Date: Aug 2010
Location: Southeastern Kansas
Posts: 15
Default PDR

Check with local auto body shop that specializes in paintless dent removal. I don't know if it will work with aluminum, but it's worth a try.
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