[PSUBS-MAILIST] gel coat nightmare

[Michael Dell via Personal_Submersibles]

No problem.

Brushing is always a bit hit n miss, pays to apply 2 coats if brushing and
second coat should go on as soon as it has gelled, if you miss that window
it will attack the first layer as the laminate did...  Ideal thickness when
sprayed is 0.010 - 0.020 of an inch checked wet as the cured thickness is a
little less...

I've have over 35 years experience in the composites industry in aerospace,
marine and transport so feel free to ask if you have any questions....

Mike.

On Tue, 18 Dec 2018, 12:31 p.m. Brian Cox via Personal_Submersibles <
personal_submersibles at psubs.org wrote:

> Wow, thanks Mike !    The gel coat was extremely thin.   When I did the
> mold I used "tooling gel coat "  and I painted it on and hence put it on
> much thicker.  Then when I did my part I sprayed it on ,  it goes on more
> uniformly but apparently I did not do enough coats.  And on top of that I
> let it sit for two days.
>
> Brian
>
>
>
> --- personal_submersibles at psubs.org wrote:
>
> From: Michael Dell via Personal_Submersibles <
> personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] gel coat nightmare
> Date: Tue, 18 Dec 2018 12:15:37 +1000
>
> Too much mold release wax will only cause a problem called pre release...
> And the name suggests it shrinks away from the mold surface prematurely and
> looks completely different to the problem in the image, looking at the
> image it it definitely styrene attacking a insufficient gel coat film
> thickness...
>
> Mike
>
> On Tue, 18 Dec 2018, 12:35 a.m. hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org wrote:
>
> Brian. My friend thinks you put too much mold release spray on.  He just
> puts a mist on
> Hank
>
> Sent from my iPhone
>
> On Dec 17, 2018, at 5:36 AM, hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Brian,
> sorry to see your troubles, but I think you you have a bad chemical
> reaction rather than lay up thickness problem .  I am having morning coffer
> with a life long friend  that used to be in the hot tub business.  He made
> moulds for a living.  I will get the skinny from him for you.
> Hank
>
> On Sunday, December 16, 2018, 7:48:58 PM MST, Michael Holt via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> A while ago I told about something called Styrospray.  It's a rigid
> material that seems to be applied with a brush.  It's used for making
> light things like signs but my application is for a Snark Sunflower (to
> replace the ABS sheath).  I've not yet tried it.
>
> It's from industrialpolymers.com
>
>
> Mike
>
>
>
>
>
>
>
> ---
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