Mapping line ???

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  • Simon Tingle
    February 6, 2012 at 4:18 pm #35752

    iv got a body shop in the uk that iv been running for over 10 years and need some help on something iv never seen before.
    iv joined a fibreglass panel together and now its painted you can see the line … iv taken it back re fibreglassed the join sanded and filled with u-pol 7 and maxmayer primer over top after sanding with 80 grit. in-between ever stage we have heat dried it. now it is painted it looks ok but once heat is applied on the panel the line of the join shows up but not the line of the filler that cover a more wider aria ??? do you have any idea what this can be. we have taken the filler and glass fibre out of the join twice now heat dried all stages and its still doing it.

    please help.

    Simon :wak

    carl anderson
    February 7, 2012 at 6:39 am #35769

    i have seen this in some apps ie hood ornament hole elimanted holes in some types of plastic bumper covers . mostly on dark colors somtimes this can be elimanated by adding flex agent to primer it will tend to move a bit while the substrates cure .

    tommy
    February 8, 2012 at 10:07 pm #35812

    hi your mapping line will come from sanding with 80 grit i would think

    i would do your rough fiberglass repair in 80grit
    then do your skim of filler to level repair then cut with 80.then 120

    after this i would put a skim of glaze/stopper over the full repair and sand with 120 then 180 and finish with 240g

    primer / flaten with 400 then 6/800 paint /clear

    with doing any fiberglass i always leave it to air dry rather than force dry it

    tommy

    nick
    February 9, 2012 at 10:30 pm #35823

    [quote=”simon206wrc1″ post=25076]iv got a body shop in the uk that iv been running for over 10 years and need some help on something iv never seen before.
    iv joined a fibreglass panel together and now its painted you can see the line … iv taken it back re fibreglassed the join sanded and filled with u-pol 7 and maxmayer primer over top after sanding with 80 grit. in-between ever stage we have heat dried it. now it is painted it looks ok but once heat is applied on the panel the line of the join shows up but not the line of the filler that cover a more wider aria ??? do you have any idea what this can be. we have taken the filler and glass fibre out of the join twice now heat dried all stages and its still doing it.

    please help.

    Simon :wak[/quote]

    Hi Simon

    I am also from the uk small bodyshop in scotland good to see another brit on here.

    How did you join the two parts was it with fibreglass matting and the proper fibrebglass resin.

    There has been threads here before concerning fibreglass repairs, i am not that experienced on them.

    I am sure somebody will chime in

    Agustin Ybarra
    February 27, 2012 at 5:17 am #36012

    water borne sealer over that will help hide the line……….we were doing a lot of the early 2000’s firebird and camaro roofs made of that SMC/Fibre the factory adheasive would show through the paint if sanded to coarsley if repaired.

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