It was Spain that were going to veto any attempt for a separate Brexit deal for Scotland that Sturgeon proposed too - http://www.telegraph.co.uk/news/2016/12/22/spain-rejects-nicola-sturgeon-brexit-plan-scotland-seemingly/
There's no argument economically for the Scots to vote leave but it's about far more than that, it's an ideological one. We did some great things together as The UK, I hope they stay in touch once they've gone.