ASp

Being sinistral too, and having the habit of hooking my hand over the top of the page, I too have come across the smudging problem. My solution is too hook my hand even farther over, thereby giving me a run at two or three lines' worth before the bas of my hand comes into contact with the ink - thereby giving it a reasonable amount of time in which to dry. Not for everybody, though...

And I do crosswords with whatever implement comes to hand!