Faring / Filling compound  
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Faring / Filling compound - 3/13/2008 3:06:18 AM   
Nightz



Posts: 215
Joined: 1/4/2003
From: DeKalb, IL,
Status: offline 		Hello,

I'm rebuilding a kit that several years old. It's full of dings, scratches, low spots, and many other forms of hanger and field rash.
I stripped off all the covering and sanded all the glue off. I'd like to paint it instead of recovering. I'm looking for suggestions on a faring compound to smooth it out.

I figure I'll cover the whole plane with a thin layer and then sand it smooth. So, something light, easy to sand, and strong.

Drywall compound/filler was mentioned in another forum but I was concerned it would be too soft. Epoxy and microballons I fear is to heavy and difficult to sand.

What do you think?

Thanks,
-Rocko
       Post #: 1

RE: Faring / Filling compound - 3/13/2008 3:10:23 AM   
dhal22


 

Posts: 1233
Joined: 8/28/2006
From: Roswell, GA, USA
Status: online 		i use Bondo spot putty. available from auto centers. very light, very easy to sand and durable. i also have a big tube of blue body filler putty made by 3M but i don't recall the name right off hand. i bought it on #bay. it is very similar in performance.

david

(in reply to Nightz)
       Post #: 2

RE: Faring / Filling compound - 3/13/2008 5:34:35 AM   
combatpigg



Posts: 9826
Joined: 11/22/2003
From: arlington, WA, USA
Status: offline 		If your plane is made with balsa, you want a soft filler that will feather out easier than the surrounding wood. Light weight spackle is the way to go.

_____________________________

Led Zeppelin is NOT "old fogie" music.

(in reply to dhal22)
       Post #: 3

RE: Faring / Filling compound - 3/13/2008 2:07:43 PM   
Nightz



Posts: 215
Joined: 1/4/2003
From: DeKalb, IL,
Status: offline 		I'll probably go with the spackle. I thought I could fare it with spackle, seal, prime, and paint but after more browsing last night I guess that's not a good idea if I want to avoid cracking. I guess the best method is spackle, silkspan fabric, primer, paint.


-Rocko

(in reply to combatpigg)
       Post #: 4

RE: Faring / Filling compound - 3/13/2008 3:32:04 PM   
Ed Smith


 

Posts: 2837
Joined: 12/29/2001
From: Brantford, ON, CANADA
Status: offline 		Rocko,

I use drywall compound over bare balsa all the time for the purpose you mentioned. It sands and blends very easily with the surrounding balsa. I do not like the spackle, it seems to "Roll" rather than sand.

The picture shows a balsa fairing blended to the main fuselage with drywall compound.

Ed S

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(in reply to Nightz)
       Post #: 5

RE: Faring / Filling compound - 3/13/2008 3:41:36 PM   
Nightz



Posts: 215
Joined: 1/4/2003
From: DeKalb, IL,
Status: offline
quote:

ORIGINAL: Ed Smith

Rocko,

I use drywall compound over bare balsa all the time for the purpose you mentioned. It sands and blends very easily with the surrounding balsa. I do not like the spackle, it seems to "Roll" rather than sand.

The picture shows a balsa fairing blended to the main fuselage with drywall compound.

Ed S


Good catch....I was using the work compound and spackle interchangeably but they are two different things. You are correct, I definitely want the compound, not spackle.

Thanks,
-Rocko

(in reply to Ed Smith)
       Post #: 6

RE: Faring / Filling compound - 3/13/2008 3:42:28 PM   
Walt Thyng


 

Posts: 754
Joined: 7/27/2002
From: St. Charles, IL, USA
Status: offline 		I go over large spackled areas (like wing fairings) with CA. It usually requires a final sanding with 400/600 wet or dry.
WT

_____________________________

WT in Illinois

(in reply to Ed Smith)
       Post #: 7

RE: Faring / Filling compound - 3/13/2008 9:07:25 PM   
jaka


 

Posts: 4536
Joined: 12/11/2001
From: Upplands Vasby, SWEDEN
Status: offline 		Hi!
If you want a durable finish as possible use brown microballons and polyester resin (or 24 hour epoxy) mixed 50/50. Then sand with 80 Hiolit sandpapper (cloth) and spray 2 part automotive body spackle on and sand.

_____________________________

Jan Karlsson Airracing products
MVVS, Motul "Micro" all synthetic oil

(in reply to Walt Thyng)
       Post #: 8

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