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  1. #1
    Join Date
    Feb 2007
    Location
    West Sussex
    Posts
    9,496

    GRP-suitable filler: recommendations

    My bubbletop project has now started to make some real progress, and with 3 weeks off work I expect to have the grp work finished soon. I also want to have a go at blending in the rear coffin lights.

    I'd like something that is somewhat flexible and easy sand - possibly incompatible properties?
    I'd prefer to avoid the standard car filler stuff for fear of cracking when the top flexes moving it on and off the car. Heard some bad reports about Isopon P30 that won't blend nicely.
    Looking for recommendations and products to avoid from anyone that's had a go at surface prep.
    Crendon Chassis No.49
    Huddart FE428 + toploader

    Not listed in the Shelby Register.

  2. #2
    Join Date
    May 2012
    Location
    near Thame
    Age
    42
    Posts
    212
    Could be worth trying this stuff.


    https://www.easycomposites.co.uk/bla...-repair-filler
    Cheers
    Greg
    Building MK4 GD Jag based with a Chevy 383/tremec tko600.

    Build blog/photo store https:/www.facebook.com/pg/gregsGD427

  3. #3
    Join Date
    Jan 2002
    Location
    Reading, Berks, UK.
    Posts
    1,697
    Hi Kev

    if you are building large areas use CGP, da with an 80 or 40 grit to get basic shape then smooth with a light weight filler.
    I'm using uPol Fantasitc https://www.ebay.co.uk/itm/U-POL-FAN...Cclp%3A2334524
    I use this stuff all the time on the restorations, easy sand, good build, doesn't shrink.
    Stay away from the gimmic stuff and guesswork.

    Cheers

    David

  4. #4
    Join Date
    Oct 2017
    Location
    Oxford
    Posts
    1,165
    Another vote for Upol Fantastic
    Classic Replica Viper IVA passed 25th March 2021

  5. #5
    Join Date
    Feb 2007
    Location
    West Sussex
    Posts
    9,496
    Thanks.
    Dave - what is CGP filler? Google isn't giving me answers!
    Crendon Chassis No.49
    Huddart FE428 + toploader

    Not listed in the Shelby Register.

  6. #6
    Join Date
    Feb 2011
    Location
    Northampton
    Age
    42
    Posts
    4,783
    Chopped Glass Paste, I think. I believe this is the same thing under a different name: https://www.ecfibreglasssupplies.co....fibre-compound

    I have a pot. I opened it, looked at it, decided it looked frightening and put the lid back on
    My DeDion build diary..
    Hon Sec of the Digidash branch of the Unpopular Kit Car Design club

  7. #7
    Join Date
    Mar 2007
    Location
    Maldon Essex
    Posts
    536
    Its good stuff, its WAY stronger than normal filler, and it is easy to work as well. Use it to form the base of a repair and then just skim with the thinnest of coats of normal filler to finish off. Its almost like fibreglass paste.

  8. #8
    Join Date
    Jan 2002
    Location
    Reading, Berks, UK.
    Posts
    1,697
    Kev

    your in box is full,
    cheers
    David

  9. #9
    Join Date
    Feb 2007
    Location
    West Sussex
    Posts
    9,496
    - now clear!
    Crendon Chassis No.49
    Huddart FE428 + toploader

    Not listed in the Shelby Register.

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