A few more classic porches for your collection Ken. I hadn't realised that they could be worth so much.....
I think your auto correct has been working overtime
Now, if you want to build a Porsche then I would suggest something along the following lines might be the way to go
Yes, this is a 1:16 tank but the same principles could be applied
a basic framework
gradually built up to the rough outline of vehicle
cover in filler
then sand back to get the desired contours
You will need to make a series of contoured sections to act as formers to work around - these will be the cross sectional shape of the shell at various points from front to rear. They can be solid and full width of body to help keep things structurally rigid during building then cut out once a solid body shape is created.
The formers need to be stuck to a rail or plate, spaced to match their position on the shell, so you end up with a roughly car shaped toast rack.
Then start filling in the gaps between the formers with strips
Once you have the basic shape cover in filler and sand to shape - the more formers used the easier it is to get the required shape as there is less room for error between formers
To stand a chance of doing this you will need very good measurements of the shell so that the formers accurately reflect the sectioned shape - a 3d computer model of a shell would be ideal if you can get one as you could then get the computer to take the sections (or get the whole thing 3d printed)
The whole thing will need precision measuring, marking, sanding, correcting, sanding etc - not an easy task.
Hard enough with a heavy duty tank shell
904 info - there are some plans on this link. Don't know how accurate they are.