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Paint flaking off in countersunk holes

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ianxbrown

Joined: 16 May 2009
Posts: 80

Posted: Tue Jun 15, 2010 8:45 am Post subject: Paint flaking off in countersunk holes

I recently removed a tank and was dismayed to see rusting screws and the paint coming off around the holes.  I guess I can use stainless screws instead of the regular ones to avoid the rusting, but does anyone have a solution to the paint coming off?   I think the bond with the alumin(i)um is broken as I tighten the screws but doesn't become really visible until I unscrew them.   I had the aircraft professionally painted but I'm guessing it's difficult to scuff up the countersinks.  

 

 While I'm on the subject of removing tanks, does anyone have a solution to removing the second-to-most-inboard row of baffle bracket bolts without losing major amounts of skin?  I use a short (3") wrench but I can only just get my hand in place.  All 21 bolts are difficult to remove but those three are the worst.

 

 Ian Brown,

 RV-9A  C-GOHM, Bromont, Quebec

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pitts_pilot(at)bellsouth.
Guest

Posted: Tue Jun 15, 2010 12:23 pm Post subject: Paint flaking off in countersunk holes

I think there are two issues here ..... the painter may have just painted over the screws instead of loosening them up to paint underneath the heads.  The second thing that should have been done is to place nylon washers (aircraft spruce) under the screw heads when they were tightened down, which would have saved most of the cracking paint when the screws were removed.  the washers also make it easier to remove the screws.

 Linn

 

 Ian wrote: [quote]       I recently removed a tank and was dismayed to see rusting screws and the paint coming off around the holes.  I guess I can use stainless screws instead of the regular ones to avoid the rusting, but does anyone have a solution to the paint coming off?   I think the bond with the alumin(i)um is broken as I tighten the screws but doesn't become really visible until I unscrew them.   I had the aircraft professionally painted but I'm guessing it's difficult to scuff up the countersinks.  

   

 While I'm on the subject of removing tanks, does anyone have a solution to removing the second-to-most-inboard row of baffle bracket bolts without losing major amounts of skin?  I use a short (3") wrench but I can only just get my hand in place.  All 21 bolts are difficult to remove but those three are the worst.

   

 Ian Brown,

 RV-9A  C-GOHM, Bromont, Quebec [b]

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jhnstniii(at)aol.com
Guest

Posted: Tue Jun 15, 2010 4:17 pm Post subject: Paint flaking off in countersunk holes

Ian--We put tinnermans under the tank screws and it makes for a very tidy look and no more paint worries.

    

   LeRoy Johnston/David White RV-6A Esperanza 314 hrs Ohio

 

 

   

  

 

   --

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