That's true, green granite, but I think that isopropanol is the modern useage the less to attract the meths brigade!
The Poundland stuff is at less than 5% isopropanol so the full-strength stuff might dissolve more than you want - even your desk might be at risk!
It's a really good deal at £1 for a litre and, if you're stuck, you can always use it in your bathroom! Heaven knows what a pharmacy would charge....