I'm hoping some of you more experienced with hair color can help me out. I recently started getting my hair colored only at the temples, just to cover up the grey hairs I get there. My colorist paints the color onto my greys. The rest of my hair is left alone (the color she paints on the greys matches my regular hair).

I got my greys covered up this Wednesday. I was looking in the mirror today and I see some greys at my temples. The greys are just at the roots. I'm just not sure if this is something that is unavoidable and expected, or if I should go back to the salon and have it re-touched. Anyone have any idea?

I'm also wondering if anyone has emergency tricks they use to cover up a few greys between appointments. I have heard of people using mascara. Anyone have any other suggestions?