[roc-chat] Re: Pesky Pin Holes
- From: Mike Riss <rockt_dude@xxxxxxxxxxxxx>
- To: roc-chat@xxxxxxxxxxxxx
- Date: Tue, 29 Nov 2011 15:28:23 -0800 (PST)
--- On Tue, 11/29/11, Scott Christiansen <scootdawg30@xxxxxxxxxxx> wrote:
> Anyone have an easy way to fill pin holes in fiberglass? The less
> sanding the better.
Unfortunately, there is no such thing as "easy" when dealing with pinholes.
You're either going to have to spend time, money, or both. However, the level
of effort can be reduced somewhat. The products below are just some that can
help. Which one you choose will be influenced depending on the size of the
project (both the rocket, and the number of pinholes) you're dealing with.
My favorite for pinholes, but a little pricey (worth it; sands super easy):
http://www.aircraftspruce.com/catalog/cspages/smoothprime.php
More for filling weave, but will work on pinholes too:
http://www.aircraftspruce.com/catalog/cmpages/dynalite.php
This might be what Troy was thinking of:
http://www.evercoat.com/productDetail.aspx?pID=268
Lots of stuff on this page:
http://www.evercoat.com/productCategory.aspx?cat=10
More products that are more for filling weave, but would work:
http://www.evercoat.com/productCategory.aspx?cat=2
And, I'll second Jack's recommendation of Kilz. I use the water-based stuff.
I thin the first and second coats to help get good penetration of the pinholes.
It's $8 or so per quart, and available in most home improvement sections at
your local department store, hardware store, or home improvement center.
Technique also matters, as even the best products will suffer if the method of
application introduces air bubbles. I don't recall details or links offhand,
but there are tools that help, as well as methods like waving the flame from a
propane torch over the surface after application (but this was for a specific
product, so not advised for general use).
Depending on the time, effort, and money you are investing in the rocket, you
might want to test the compatibility of all the products (filler, primer,
paint, etc.) first. The online forums are littered with the laments of many a
rocketeer who ended up with problems -- and having to spend a lot more time,
effort,and money to fix them.
Mike
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