Carbon Fibre

Carbon fibre is one of the strongest fibres known to man. It is usually the first choice of fibre if something very strong and very light is required. Racing car monocoques and aero plane wings are usually constructed of carbon. The resin that makes it rigid is usually Epoxy resin.  

When carbon fibre is first processed it is is crystalline material which is extruded into very fine fibres which on average are 16 times less than the diameter of a human hair On their own they are quite useless. Carbon fibres are supplied in tows and may vary from 1000 fibres per tow to hundreds of thousands of fibres per tow.

To be usable the fibres are laid up into what the trade call "pre-preg" ( impregnated) a cloth  consisting of a base of very fine glass-fibre or woven carbon fibres. The purpose of this is to enable the carbon fibres to lie longitudinally without falling apart. A resin system is then applied and then a layer of paper tape on top to hold everything together. The pre-preg is usually made in rolls 30 m x 1 m.  

Lots of Products can be made from carbon fibre.

Fishing rods are very light and strong. One problem however is that carbon fibre is a good conductor of electricity and this can pose a danger with overhead cables.

Laying Carbon fibre (Quote from 

 http://www.ultimatecarpage.com/forum/showthread.php?t=5875

First you need to start with some sort of pattern for what you want to make, a former of sorts, then you need to make a mould out of that by laying fibreglass on it until it covers all the parts that you wish to have in your bit of carbon fibre. The mould has to be really thick otherwise it'll break when you try and remove your cf. Then there's all the skill in laying up the carbon fibre and ensuring the correct mixture ratios.
Then if you're wanting to be fancy you have to get rid of the excess resin.
That's all a bit vague, but you kind of get the idea.
Making moulds and stuff costs heavily, you really would need to make more than one item and sell them on at a profit, otherwise it'll cost you tons.