[PSUBS-MAILIST] fiberglass shell

[Alan via Personal_Submersibles]

Hi Brian,
I am hearing alarm bells. The plaster of Paris will have to be pretty dry & any
resin from your fibreglassing would suck in to it unless you gave it several coats
of shellac first then put on a mould release wax. This is from memory from a long
time ago. Also I have vague memories of coating polystyrene with pva glue which
doesn't dissolve the polystyrene, & fibreglassing on to that. 
Will take a big block of polystyrene.
Alan

> On 12/08/2020, at 3:14 PM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Hi All,
>                I"m thinking of doing a fiberglass nose cone for the front of my sub which will have flotation foam in the top part of it.  This time rather than make a whole mold assembly I was thinking I would dig a large hole in the shape of the nose cone, use plaster to get it smooth and then just put fiberglass against the inside of the plaster.  Then lift the thing out and break off the plaster.  
> 
> Brian
> 
> 
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20200812/5fa94fa2/attachment-0001.html>