Have a stockcar bonnet, am wanting to make a fibrelass mould off it, have the materials but am wondering how to go about it, also would it need to be sprayed wit Gelcoat or something similar aferwards to make it a smooth finish!
rocky0169,
Feb 9, 3:38am
Make a plug off the original first then a mould off that. once the mould is made. you can use that for more copries of the orginal peace but . yeh you need to make a plug first.
dasfi,
Feb 9, 3:41am
What you mean by plug!
pollymay,
Feb 9, 3:48am
A casting that you can lay the fibreglass over to create the new piece. It's what you are calling the mould. What is it shaped like!
elect70,
Feb 9, 8:44pm
rocky hat will belarger, need to made a anotherfrom inside that 1 to get truecopy
kerrieann,
Feb 9, 8:46pm
youtube is your friend :}
jenny188,
Feb 9, 10:27pm
Borrow a book on fiber glassing from your local library or U Tube on the net. Either male mold it (external) or female it (internal). Both molds will require releasing agent. Male mold will give smoother top finish.
rob_man,
Feb 9, 10:38pm
Your existing bonnet is your plug, given that it is off a stock car and won't have to win any hotrod show awards you don't need to be too fussy. If you spray a couple of coats of PVA release agent over it you can lift a mould straight off it. Use any colour gelcoat and polyester resin and chopped strand mat to make your mould and then repeat the process on the inside of that to make your bonnet. If it's a bit rough you can sort it out before painting it.
neville48,
Feb 10, 3:09am
where are you. Its not that easy believe me and without 1 on 1 help you will not make a successful plug, mould and product,a book may help but I doubt it, if it were that easy everyone would be doing it, its a skilled process and if you ballz up any part of the process you may as well not have started, fact.
socram,
Feb 10, 3:41am
The mould you make off your original bonnet needs strengthening or bracing otherwise it will be too fragile.Your bonnet will probably be twisted and you'll have one hell of a job to make it fit.
On my own car, I simply waxed the original (bare steel) bootlid and laid 600 glass mat cut to size first, then a layer of woven over that - but I didn't need the lip at the edge.When dry, I reinforced it on the inside. I should have used 'peel ply' over the woven to give a smoother finish, but I skimmed it instead as I had other modifications to make to it anyway.
naphtha,
Feb 11, 8:19pm
Try something small, but similar in shape to what you finally want to finish with. Get the hang of what you have to do with the materials,timing and ratios of mixtures,etc. Better to stuff up small job than ruin the bonnet job.Good luck
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