How do I effectively shave my scalp ?

I actually think that using Nair on your head will work. It's a hair remover that removes hair past the roots. Try it on your arm or something first, if it burns, that can be unfornuate on your head, it might cause scalp irration, and permanent lack of hair growth which would look bad with a red scalp.

If a test works, you can use it on your head. Be sure to saturate it and leave it on for much longer than it says, probably 20 minutes is too long. Wash it out in the shower, it does not matter what water you use as long as it is not piercing hot.

You should have no hair, if you don't you can always try again.

And a super huge warning: If you use women's nair (as opposed to mens, but it will work SO much better!) it will smell HORRIBLE! The smell literally makes me sick.

I do this every time my hair grows back, and it usually takes a few weeks.

If that doesn't work, you can always try waxing (which hurts!)

well, I read something about this in a book.

They said, the best way to do it is to have someone else shave it for you.

Shave WITH the grain, the way your hair grows.

It takes me about 5 minutes to shave my legs. I shave about every other 2-3 days.