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sandhopper
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Joined: December 13, 2004
Posts: 453
Location: Norwalk Ca
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 Posted: Thu Mar 09, 2017 10:11 am Post subject: plaster of paris |
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I saw somewhere tha a guy did a plaster of paris mold to repair a fiberglass Tow'd nose
I would like to find that post anyone know ?
Last edited by sandhopper on Thu Mar 09, 2017 11:00 am; edited 1 time in total |
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Q-Dog
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Joined: April 05, 2010
Posts: 8698
Location: Sunset, Louisiana
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sandhopper
Samba Member
Joined: December 13, 2004
Posts: 453
Location: Norwalk Ca
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| Posted: Thu Mar 09, 2017 10:59 am Post subject: Re: plaster of pairs |
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| I did try that in the search , still did not work |
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[email protected]
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Joined: July 02, 2003
Posts: 591
Location: Florida Space Coast
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sandhopper
Samba Member
Joined: December 13, 2004
Posts: 453
Location: Norwalk Ca
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| Posted: Thu Mar 09, 2017 12:59 pm Post subject: Re: plaster of paris |
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| tanks that is the one I was looking for |
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Dale M.
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Joined: April 12, 2006
Posts: 20377
Location: Just a tiny bit west of Yosemite Valley
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| Posted: Fri Mar 10, 2017 7:52 am Post subject: Re: plaster of paris |
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If you are looking for a "form" to work over to do repairs of cracked or missing fiberglass, I have use Styrofoam block carved to shape and covered with kitchen plastic wrap...
Dale
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sandhopper
Samba Member
Joined: December 13, 2004
Posts: 453
Location: Norwalk Ca
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| Posted: Fri Mar 10, 2017 8:01 am Post subject: Re: plaster of paris |
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I have done the foam thing on small parts
I have access to a hood so I thought a would try and do a mold this time |
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surfnc
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Joined: September 29, 2006
Posts: 948
Location: OBX, NC
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surfnc
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sandhopper
Samba Member
Joined: December 13, 2004
Posts: 453
Location: Norwalk Ca
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| Posted: Fri Mar 10, 2017 6:28 pm Post subject: Re: plaster of paris |
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Thanks Vince
I did this once for a dune runner repair after I saw one of your posts
I just thought that the cost of fiberglass to make only one part ( big part ) would be more than using POP
If I could get way with not doing a mold that would be the best
What I mean is lay several layers of fiberglass over the orignal then remove orignal and sand the new part smooth . This would make the new part a little bigger , but that is ok
Will this work ???? |
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surfnc
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Joined: September 29, 2006
Posts: 948
Location: OBX, NC
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| Posted: Fri Mar 10, 2017 6:36 pm Post subject: Re: plaster of paris |
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You could do a thin layup so it would not be too much bigger and then glass it from the underside to build up thickness. Then you can sand the face/top side smooth.
Hopefully this makes sense.
Vince
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sandhopper
Samba Member
Joined: December 13, 2004
Posts: 453
Location: Norwalk Ca
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| Posted: Fri Mar 10, 2017 6:56 pm Post subject: Re: plaster of paris |
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Vince I read somewhere if I try and add to the inside to a thin layup
the heat will cause it to warp
I think if I use cloth insted of mat it may work , just not sure how many layers it would need |
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surfnc
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Joined: September 29, 2006
Posts: 948
Location: OBX, NC
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| Posted: Fri Mar 10, 2017 7:01 pm Post subject: Re: plaster of paris |
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If you add too many layers at once it will heat up. Start with 2 layers, let them cure than keep adding till it is the same thickness as the rest of the part/panel. 3 layers is usually what I stay with to keep the heat and warping to a minimum.
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sandhopper
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Joined: December 13, 2004
Posts: 453
Location: Norwalk Ca
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| Posted: Fri Mar 10, 2017 7:14 pm Post subject: Re: plaster of paris |
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Thanks Vince
So if I get this right whjat you are saying
1) lay 3 layers on the top of the part that I want to copy
2) remove original part
3) lay up additional layers to the inside , but only 2 or 3 at a time
to keep the heat down
do I use mat or cloth ? |
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surfnc
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Joined: September 29, 2006
Posts: 948
Location: OBX, NC
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| Posted: Fri Mar 10, 2017 7:22 pm Post subject: Re: plaster of paris |
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I would lay out 2 layers of matt on the part to copy.
Then layup 3 layers on the underside at a time till you get the thickness you want.
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