Filling pinholes in fiberglass

Filling pinholes in fiberglass

Post by Kevin Reza » Fri, 11 Jan 2002 01:48:27



Since I found that priming my fiberglassed rocket really shows off the
pinholes, I now need something to fill them with. I remember in a past HPR
article was a recommendation to use something called ICING. Personally, I've
never seen the stuff in any of the stores I frequent. Any suggestions on
what type of store to find this in? What is it's "designed for" purpose?
Anything else that works well?

Kevin Rezac

 
 
 

Filling pinholes in fiberglass

Post by Joel » Fri, 11 Jan 2002 01:50:10


Instead of using a spray on primer, use Rustoleum clean metal primer in
quart form, brush it on, let dry and sand it ( Sands real easy ) that should
fill in any pinholes.

JR
77267
L1


Quote:
> Since I found that priming my fiberglassed rocket really shows off the
> pinholes, I now need something to fill them with. I remember in a past HPR
> article was a recommendation to use something called ICING. Personally,
I've
> never seen the stuff in any of the stores I frequent. Any suggestions on
> what type of store to find this in? What is it's "designed for" purpose?
> Anything else that works well?

> Kevin Rezac


 
 
 

Filling pinholes in fiberglass

Post by Kurt Kesle » Fri, 11 Jan 2002 02:03:34




Quote:

> The overall solution is to allow the appearance to look good from 5+ feet
> away, not 1 foot away.

Blasphemy.

--
Kurt (So sayeth zen sanding master) Kesler

 
 
 

Filling pinholes in fiberglass

Post by Jerry Irvi » Fri, 11 Jan 2002 01:54:35



Quote:

> Since I found that priming my fiberglassed rocket really shows off the
> pinholes, I now need something to fill them with. I remember in a past HPR

Gow tih fiberglass to avoid the spirals of paper and you still have a
"finishing" problem.

The solution on the fiberglass is to vacuum the surface.

The overall solution is to allow the appearance to look good from 5+ feet
away, not 1 foot away.

Quote:
> article was a recommendation to use something called ICING. Personally, I've
> never seen the stuff in any of the stores I frequent. Any suggestions on
> what type of store to find this in? What is it's "designed for" purpose?
> Anything else that works well?

> Kevin Rezac

--
Jerry Irvine, Box 1242, Claremont, California USA

Bring common sense back to rocketry administration.
 
 
 

Filling pinholes in fiberglass

Post by Andy Waddel » Fri, 11 Jan 2002 08:04:25


Try automotive spot putty.

--
Andrew D. Waddell
PML Online Support Rep
NAR L2 52875/TRA L2 2043

PML: www.publicmissiles.com

Quote:
> Since I found that priming my fiberglassed rocket really shows off the
> pinholes, I now need something to fill them with. I remember in a past HPR
> article was a recommendation to use something called ICING. Personally,
I've
> never seen the stuff in any of the stores I frequent. Any suggestions on
> what type of store to find this in? What is it's "designed for" purpose?
> Anything else that works well?

> Kevin Rezac

 
 
 

Filling pinholes in fiberglass

Post by Stev » Fri, 11 Jan 2002 08:07:14


Quote:
> Since I found that priming my fiberglassed rocket really shows off the
> pinholes, I now need something to fill them with. I remember in a past HPR
> article was a recommendation to use something called ICING. Personally, I've
> never seen the stuff in any of the stores I frequent. Any suggestions on
> what type of store to find this in? What is it's "designed for" purpose?
> Anything else that works well?

  more epoxy, Fill-N-Finish, epoxy mixed with microballoons, or the
filler of your choice.  Having a tub of filler around is a very handy
thing when you're finishing rockets!

steve

 
 
 

Filling pinholes in fiberglass

Post by ....E » Fri, 11 Jan 2002 08:37:51


Poly Fibers Super Fil and UV Smooth Prime work well. Shadow Composites and
Aircraft Spruce & Specialty are a couple of sources.
Regs,
....Ed


Quote:
> Since I found that priming my fiberglassed rocket really shows off the
> pinholes, I now need something to fill them with. I remember in a past HPR
> article was a recommendation to use something called ICING. Personally,
I've
> never seen the stuff in any of the stores I frequent. Any suggestions on
> what type of store to find this in? What is it's "designed for" purpose?
> Anything else that works well?

> Kevin Rezac

 
 
 

Filling pinholes in fiberglass

Post by Davi » Fri, 11 Jan 2002 11:47:02


I use Plasticote Spot Filler and Primer.  It is a gray spray-can high-build
primer.  I get it at Pep Boys (auto parts store).  It takes about 2 coats,
with sanding in between, to get the pinholes out.  I love this primer
because it wet sands down to a glassy smooth, hard surface and both Krylon
and Rustoleum stick to it well.

-- David


Quote:
> Since I found that priming my fiberglassed rocket really shows off the
> pinholes, I now need something to fill them with. I remember in a past HPR
> article was a recommendation to use something called ICING. Personally,
I've
> never seen the stuff in any of the stores I frequent. Any suggestions on
> what type of store to find this in? What is it's "designed for" purpose?
> Anything else that works well?

> Kevin Rezac

 
 
 

Filling pinholes in fiberglass

Post by Jon Ros » Fri, 11 Jan 2002 13:04:16


Kevin,
What you are referring to is made by US Chemicals and Plastics (USC). It is
called 'Autobody Icing' and is a pourable, brushable polyester finishing
putty. It comes in a 30 oz. can with a 1 oz. tube of 'raspberry cream'
hardener. I bought some last year after reading about it in Ed Miller's
finishing articles in HPR, and really liked using it. It dries in 15
minutes, sands extremely easily and leaves a great finish surface. The down
side was it needs a 50/1 mix ratio with the hardener and was very sensitive
to a bad mix ratio. It also starts to set in about 4-5 minutes which was a
bit too fast to brush on the areas I needed it for, especially when filling
spirals.

I tried the 3M version recently and like it a little better. It doesn't set
up as fast and is much less sensitive to the mix ratio being off a little.
Its 3M part number 051131-05821, 'Piranha Putty'. You can get both products
at automotive paint stores. I got both at my local Sherwin Williams
Automotive Paint store.

HTH,
Jon


Quote:
> Since I found that priming my fiberglassed rocket really shows off the
> pinholes, I now need something to fill them with. I remember in a past HPR
> article was a recommendation to use something called ICING. Personally,
I've
> never seen the stuff in any of the stores I frequent. Any suggestions on
> what type of store to find this in? What is it's "designed for" purpose?
> Anything else that works well?

> Kevin Rezac

 
 
 

Filling pinholes in fiberglass

Post by Glen Gardne » Sat, 12 Jan 2002 11:09:29


Try this;

Clean the fiberglass thoroughly with *** and let it dry.

Then, mix up a small batch of epoxy  and rub a thin coating into the skin of
the glass' with a lint-free ***-dampened rag.  Essentially, you want to
rub the epoxy in, and try to wipe it off.

Let the epoxy dry thoroughly.

Now, polish the fiberglass with 000 steel wool until it shines like glass
(doh).

Your airframe should now be free of pinholes and scratches.

Glen Gardner

Quote:

>Since I found that priming my fiberglassed rocket really shows off the
>pinholes, I now need something to fill them with. I remember in a past HPR
>article was a recommendation to use something called ICING. Personally,
I've
>never seen the stuff in any of the stores I frequent. Any suggestions on
>what type of store to find this in? What is it's "designed for" purpose?
>Anything else that works well?

>Kevin Rezac

 
 
 

Filling pinholes in fiberglass

Post by Neil Tarasof » Sun, 13 Jan 2002 09:22:56


Steve,

BONDO is perfect. I have complete instructions for finishing fiberglass from
Scott Glass. If you have a fax# I will fax to you, or an address & I
will mail to you.

Neil tarasoff

Quote:

> > Since I found that priming my fiberglassed rocket really shows off the
> > pinholes, I now need something to fill them with. I remember in a past HPR
> > article was a recommendation to use something called ICING. Personally, I've
> > never seen the stuff in any of the stores I frequent. Any suggestions on
> > what type of store to find this in? What is it's "designed for" purpose?
> > Anything else that works well?

>   more epoxy, Fill-N-Finish, epoxy mixed with microballoons, or the
> filler of your choice.  Having a tub of filler around is a very handy
> thing when you're finishing rockets!

> steve