I have just taken my nail varnish off and the underneath of my (longer) nails are yellowy. Ugh. Would anything make them look whiter as I don't want to wear dark varnish for a while, at least till some of my shorter nails grow !
Barbara Daly makes a clear nail polish called Goodbye Yellow, which has a whitening agent in it. You can also use it in the future as a base coat to stop the nails staining.
get to boots and buy cutex whitening nail varnish remover to use when using polish is £1.29 and works think it got bleach in it and get some almond oil and rub in daily hope this helps