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Hi Nate,
Welcome to the forum and thank you for the kind words. It's an ambitious project and it will be a long road but if you're determined to do it and have the patience to see it through then there's no reason why you shouldn't be able to make the car a reality.
The Bailey Blade project that neilb mentions is indeed a good reference both in terms of how to go about the pattern making project and in terms of showing just what you're letting yourself in for. In a well funded professional environment if you did have 3D CAD models of your car then you could simply have these machined out of polyurethane tooling board by a 5 axis CNC router and in an afternoon you'd have a dimensionally accurate pattern ready to do final surface prep on and potentially start pulling moulds. In reality though, for most of us the budget for that kind of machining (not to mention the cost of the block and the fact that you probably don't have a 3D CAD model of your car!) mean that traditional large-scale pattern making techniques of an MDF or plywood 'profile' skeleton packed out with polyurethane foam and then surfaced and shaped with enough bodyfiller to sink a battleship is more likely.
There's no secret at all to the profile skeleton/foam/filler pattern making process (the Bailey Blade being a nice example of this), just quite a lot of work. When you've got the pattern almost there then I'd suggest heavy coats of 2k filler primer flatted back and polished to the final finish. Once you get that far then you're well on your way!
We'll be filming a new series of video tutorials which will cover pattern making from foam or MDF in the coming weeks and months whcih you might find interesting or helpful.
I wish you all the best with it and look forward to seeing how you get on.
Best regards, Matt
Matt Statham Easy Composites / Carbon Mods - Technical Sales
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