[PSUBS-MAILIST] Fiberglass work k-250 mbt

[Michael Dell via Personal_Submersibles]

What shape are you looking to make?

Mike

On Wed, 2 Sep. 2020, 3:54 am Philippe Robert via Personal_Submersibles, <
personal_submersibles at psubs.org> wrote:

> 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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>>>>>
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