I haven't got many at the moment - not enough to merit "proper" colouring/dyeing, as just the odd stray one here and there, but I would like to conceal them if there is a quick, easy and effective way of doing so. I just don't feel confident about what to try - been looking at various products including L'Oreal Magic retouch Brush and sprays etc. but all seem to receive as many negative as positive reviews, and I'm very keen to avoid wasting my money... I've got thick, curly medium-dark brown hair...any recommendations, please?