Sorry, can't help with removing of streaks, but as far as spray tans go you do need to be a little careful here as well, I had one (st. tropez) about a year ago, exfoliated prior using some exfoliant that the beauty therapost gave me, but the day I had it done was the hottest day of the year, not good when using spray tan, you've guessed it it went streaky, apparantly because of excessive sweating (us ladies don't sweat we glow don't we!!!) but I did get a full refund even though I looked a bit freakyish for a while!!!!!