[Closed] Axe sharpening - what angle?

Hello,

My friend (and he still is) was using my axe to chop some kindling. He was chopping straight onto the hearth, took a lovely big chunk out of the hearth as well as blunting the toe of the axe - argh!

I've filed the blunted part of the toe, been over it with a diamond file, then 600 grit wet and dry. I seem to have done a bad job as now most of the cutting edge is pretty blunt. I've been working the files from the cutting edge to the poll, with a slight diagonal movement.

Am I holding the files at the wrong angle? (been using about 20-30degrees) Have I not taken enough metal off? It's all been done by hand How long should it take?(I've been at it for an hour or more now).

Any advice welcomed - thank you!