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Location:
Sydney
Registered:
February 2003
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 fibreglassing new frontbar
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Mon, 19 May 2003 08:55
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can anybody help me here
i am building a new front bar
and i want to use the original, clean it up, build it up to my newly designed shape using polystyrene or balsa or something else, and then take the mould off that and then build my final product.
the guy from fibresports tells me that nothing will stick to the original bar and wat i hav to do is make a mould of the original, make a fibreglass copy of it, and then build up the fibreglass copy as things will stick to it. then make a mould of that, and the final product with that.
i can believe that nothing sticks to the origianl plastic, what about contact adhesive, or even bloody superglue!
can anyone help me here, wat do i do?
just to add, this guy was rude and a shithead.
thanks guys
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Location:
Sydney
Registered:
February 2003
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Re: fibreglassing new frontbar
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Mon, 19 May 2003 09:49
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hmm he was a shithead but mayb he was right
coz i think the bar is made from polypropylene
which of course is impossible to bond
faaaaaarrrrrrrkkkkkkkkk!!!!!!!!
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Location:
Sydney - Northern Beaches
Registered:
January 2003
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Re: fibreglassing new frontbar
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Tue, 20 May 2003 11:04
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maybe you cant bond to it, but if your using it to make a new one anyway, why not fix throught it, just attach some 3mm MDF or something that you will be able to stick to using screws or bolts or something, just fare it in and be gental with it so not to crack the joins surely that would do it.
Al
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Location:
Melbourne
Registered:
February 2003
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Re: fibreglassing new frontbar
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Tue, 20 May 2003 16:53
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hey str8 !
i am not 100% sure wat will work and what u hav tried but this is what i would try.
firstly i would get another crapy bumper from the wreckers to experiement on.
things will stick to polyprope, if u try hard enough!!! i think!
and yeah like wat simulant said, u could use screws and bolts to lock everything 2gether then bog it. just hav to make sure the joins r real tight and stiff. no movement or when u bump or transport your bumper it will crak at joints and stuff. and when u want to mold it when using fibreglass it will not be clean, and more work will be needed.
amm ok a few ways i would try...
BOGGIN! 
I would try BOG first! i am very sure u will be needing alot of bog for your REFORMING of your bumper! the problem with PP, is that it is abit rubbery and smooth, so i will need to rough up the surface b4 u bog the surfaces. so get some 40 grit sand paper, and some 60. there r 2 kinds of bog. ther is bog with fibreglass fillerments in it that is good and strong but tougher to work with. cause when u sand it back u will need a mask cause of the fibreglass dust! ichy shit!
my favourite is good old normal BOG! that should do the trick! i can tell u some tricks l8ta if u need, in shaping, making bog and mastering the art of BOG. 
only problem with bog it is not flexible and it will crak at certain joins especially with PP.
MEK
or another way is using a chemical called MEK that MIGHT bond PP to itself. MEK is not a glue but like a melting agent that bonds the same material together. MEK works really well with Compressed Styrene, compressed styrene is normally used for Vacuuming forming stuffin.
only bad think with MEK is that it only bonds the same type of plastic to itself. eg PolyProp will only bond to PolyPro. In most cases!
P.S. i dont think there will be enough Supa glue in Australia to help u with a bumper. and anyways supa glue is too evil cause it would be strong enough, and it is too stiff and crak, and most of all,that u will be glueing your fingers 2gether more times than the actual bumper.
FIBREGLASSING
amm another way will be to use fibreglass. the auto industry usually use straw or stock fibreglass ( i think that is wat they call it), that is quite hard to use but is the proper stuff. i have only used fibreglass matts or fabric. its easy and quite fun when u get a hang of it. the fibreglass fabric will help u attach and blend all your new shapes and forms onto your main bumper. like wraping a bandage on then wiping resin on it to made it nearly bullet proof! just add more layers of the fabric for strength.
and when making the new shapes and forms for the bumper u can use something called GREENFOAM( think it is PolyUrethane Foam). u can easily shape it instead of wood or BOG, then all u hav to do is Glass it to your main bumper.
Glassing is quite difficult. needs quite abit of practise. cause lik bog when it goes hard, it will be DAM HARD! and with FibreGlass its 100 times harder than bog and with the edges it's DAM sharp! soo be dam careful.
these are the only way i can think of rite now.
if u r goin to attempt to try one of these crazy methods PM mee, cause i have learnt a lot of things from doing all the wrong things! soo if u dont want to inflict any harm, physically and mentally to yourself, love ones, friends, objects of desire or family pets, giv mee a PM b4 u imbark on this fun yet, anoying mission.
GoodLuck man!
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Location:
Sydney
Registered:
February 2003
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Re: fibreglassing new frontbar
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Thu, 22 May 2003 07:22
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yeh i think i hav decided to just make a fibreglass replica and work that. save me putting holes an stuff in the nice factory bar since they are hard to come by.
thanks very much for the input guys!
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