You should start with the back and bottom of your head. Backcombing is a skill and you get better at it the more you do it. So the last ones you do will look the best and you want your best to be the ones people see and your worst to be the ones hidden. So it only makes sense to start in the back. A good idea when starting dreads with the backcombing method is to get some synthetic hair and backcomb a dread or two to get the hang of it before you start on your head.

Yes there is. You can mess up while your backcombing if you push to much hair forward at a time. Some people get confused and push all the hair forward at one time. You should hold the hair taught and only push about an inch at a time. You will only push a few hairs into the dread at a time. But it is a long process and you should know if before you start.

You don't have to but you will use about 10 plastic combs instead of just one metal comb. The plastic combs just aren't durable enough to push hair back at that force and not break. You will end up with little plastics bristles all throughout your dreads.

You should create a graph of 1 inch sections of hair.

click here for a example

Backcombing is a lot like teasing hair except you leave the hair teased. It is basically pushing the hair towards the scalp.

Usually people only backcomb once, but sometimes they don't push the hair back hard enough when they are backcombing and the knots start to spread out. In this case you will want to backcomb again. You can start at the root and push the knots you have already made towards the scalp.