How can i hide my keratosis pilaris on my arms REALLY well for 1 night? :(?

sally hansen spray on legs is AMAZING. Or rimmel London do a good wash off tan that if you leave to dry, doesn't rub off onto clothes! Also Mac do a face and body foundation which I've heard is good too. Make sure to moisturise before and let it dry! Have an amazing night and don't worry it will be dark inside anyway :)