Re: Share your custom gas tank!
Foam and epoxy resin is the easiest way to sculpt in my opinion.
Carve the block of foam to shape, glass it with epoxy marine resin and cloth.
I used to build fiberglass RC boat hulls using this process with great results.
If you need it hollow, simply dissolve out the foam with lacquer thinner after glassing.
Messy as hello and fairly deadly chemically to you so read the instructions.
Very nice work there 2door! Btw...
If more is better, then too much is just enough.
If you can't afford it, build it yourself.