I have just started to go grey (boo!).

So to cover it up, I bought Lloreal's golden blonde semi-permanent hair-dye. But it doesn't completely cover the grey (the hair strands not covered look white to be honest).

My natural hair colour is ash blonde (or what most people would call light brown ).

Is it likely to work if I switched to using the lightest ash blonde semi-permanent dye available and try to get the white hairs to blend in instead?

I would appreciate any advice as I am a complete noobie at this sort of thing.

Actually, I've just noticed that the box says that it is permanent ... I told you I was a noobie at this!

It also says on the box that it will give 100% grey coverage. Yeah, right...