[roc-chat] Re: Pesky Pin Holes
- From: Stephen Beal <swbeal07@xxxxxxxxx>
- To: "roc-chat@xxxxxxxxxxxxx" <roc-chat@xxxxxxxxxxxxx>
- Date: Tue, 29 Nov 2011 15:42:16 -0800
I have good success with a high build automotive primer. Available from most
auto parts stores.
I thin the first coat and roll it on, working it into the holes. The second
coat I roll on full strength (it's pretty thick) then after sanding it off it
usually requires a third coat and sanding
Stephen
On Nov 29, 2011, at 3:28 PM, Mike Riss <rockt_dude@xxxxxxxxxxxxx> wrote:
> --- 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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