foam for fibreglassing over
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  1. #1
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    foam for fibreglassing over

    hi.i need to do some fibreglassing.

    is there some sort of foam i can use,so i can sculpture it a bit,then fibreglass over the top,then remove the foam afterwards.

    where would i get something like that from and is there a specific type of foam

    thanks
    Rod/custom/drag build profiles:
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    | 48 chevy coupe | ford f100 | tube chassis,d pop

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    Official RnS Addict mygasser's Avatar
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    hi wayne,
    you could use cheap sheets of white polystyrene insulation glued together then shaped. masking tape over it as i'm not sure if the resin would dissolve the polystyrene then glass over the tape. the tape would also make it easier to remove the polystyrene. i've got it from b&q in 8'x4' sheets in 2" thickness before so most diy/builder places should do it.
    neil.
    need a job done on your project? i may be able to help.

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    is that suitable for sanding and shaping
    Rod/custom/drag build profiles:
    Mini | Pop | Porker | Trike | Morris 8

    | 48 chevy coupe | ford f100 | tube chassis,d pop

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    Rods 'n' Sods Junkie Gerry28a's Avatar
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    Kingspan, the same as the house insulation. They do sheets with paper instead of tin foil for GRP work easy to shape with a sureform. Then either cover with aluminium tape and glass over or glass over and scrape out the foam from the back.
    Here's a pic of the foam being used to shape a new roof on a car I have. This one was much more work, I just used the foam to make a basic shape before taking a mould.
    Last edited by Gerry28a; 25-04-2019 at 06:29. Reason: Picture added

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    Official RnS Addict russ6120's Avatar
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    The guy who built cosmotron used polystyrene and expanding foam. Kingspan is a lot easier to shape than polystyrene

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    Official RnS Addict brading's Avatar
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    In this thread Rocking Wooley used brown packing tape over cardboard which I would have thought you could do over polystyrene or Kingspan

    https://www.rodsnsods.co.uk/forum/ga...s-223105/page4

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    expanding foam then bodyfiller over it than paint
    at least dick turpin had the decency to wear a mask!

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    thanks for the reply,s.

    ive ordered all the fibreglassing stuff,so a trip to b and q later should hopefully get something suitable.

    i dont think the expanding foam stuff would work for this application
    Rod/custom/drag build profiles:
    Mini | Pop | Porker | Trike | Morris 8

    | 48 chevy coupe | ford f100 | tube chassis,d pop

  11. #9
    Off the Xmas card list kapri's Avatar
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    Good timimg on this question as I need to do something similar . I'd forgotten about kingspan and it'll be ideal.

  12. #10
    Compulsive chicken choker English Impala's Avatar
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    Kingspan/Celotex is very expensive but off-cuts and seconds are regularly on EBay.

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