[PSUBS-MAILIST] Fiberglass work k-250 mbt

[Philippe Robert via Personal_Submersibles]

Hi Mike,

I don't figure how to make the mold from timber ? Maybe many cut of plywood
?

Philippe

Le mar. 1 sept. 2020 à 01:07, Michael Dell via Personal_Submersibles <
personal_submersibles at psubs.org> a écrit :

> Styrofoam is the problem, the timber is quite easy to surface and achieve
> a reasonable finish to mold from, i often make temporary molds from custom
> wood and brush on between 5 and 8 layers of polyester resin which in warm
> weather is usually achieved in a day, once cured i sand, polish and wax
> up... styro foam however is not going to like polyester at all... you could
> use the same method as i have discribed but coat the foam, and the ply for
> that matter with an epoxy resin then transition to a polyester by first
> coating the initial few coats of epoxy with a couple of coats of vinyl
> easter resin, this allows you to carry on with cheaper poly easter which is
> easier to sand etc. Or you could do the whole coating process with epoxy, i
> just find polyester easier to work and a lot cheaper.
>
> The other option is coating the foam with tape to get a rough part off
> then clean that up to get a mold proper...
>
> Mike.
>
> On Tue, 1 Sep. 2020, 12:04 am Philippe Robert via Personal_Submersibles, <
> personal_submersibles at psubs.org> wrote:
>
>> Hi David,
>>
>>
>>
>> I'm looking to make a mold with plywood and foam. I have a good idea how
>> to make It, but no idea how to have a good finish on it.
>>
>> I'm wondering what product to use to cover the Styrofoam and wood of the
>> mold, I don't want the fiberglass sticking to my mold.
>>
>>
>> Regards
>>
>>
>>
>> Philippe
>>
>> Le dim. 30 août 2020 à 15:31, David Colombo via Personal_Submersibles <
>> personal_submersibles at psubs.org> a écrit :
>>
>>> Hi Philippe, Are you looking to make the mold as a plug or a one off
>>> part. Let me know and I can give you some tips.
>>>
>>> Best Regards,
>>> David Colombo
>>>
>>> 804 College Ave
>>> Santa Rosa, CA. 95404
>>> (707) 536-1424
>>> www.SeaQuestor.com
>>>
>>>
>>>
>>> On Sun, Aug 30, 2020 at 9:42 AM Philippe Robert via
>>> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>
>>>> Hi all,
>>>>
>>>> I would like to know if someone has experience in fiberglass making. I
>>>> am looking for a starting point for making a kind of mold to construct the
>>>> mbt.  Have never work with fiberglass before.
>>>>
>>>> Regards
>>>>
>>>> Philippe
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