Built up tan on feet sucks and looks awful. How it got like that is from over tanning and wearing shoes with sweaty feet. Feet dont really need as much tan as the rest but here is a remedy to removing that ugly patchy tan.
Make up a batch of Baking Soda and lemon juice paste wipe it onto your feet and exfoliate gently and leave on for five minute then wash off with warm water.
Marks on feet are from socks, 1st photo was taken the day before, second was next day when I actually scrubbed. I used Baking soda and lemon juice and left it on for around 5 minutes then scrubbed and rinsed. For extra stubborn stains the White Magic is a nano sponge and can get those extra little stubborn bits off but be WARNED it says on the packet NO NOT put on skin. I have used this on my feet and it was magic but it does leave your skin a little raw so put some coconut oil on after. THIS IS NOT for the body as you will end up with burn marks and I dont even like to endorse this sponge for fear some of you will go for gold but it really does get the stubborn bits off your feet if you are a tana'hoic - so be warned it is NOT for the body.