You could also use a Noodler's "bulletproof" ink on cheap paper. The cheap paper will have lots of exposed cellulose, and the bulletproof ink is designed to react to and bond with cellulose. A lefty will smear Noodler's bulletproof inks on high-quality paper designed for fountain pens and calligraphy, because the sizing (coating on the paper) keeps the ink and paper apart (for beauty), but on cheapo printer paper, it bonds (like ballpoint pen ink, it doesn't dry, it polymerizes and bonds) almost immediately.

Interesting. I use Noodler's Bulletproof for check writing due to its alleged strong resistance to erasure and check washing. I have seen it mentioned as being well-suited for use on cheaper, rougher paper but hadn't really given it much thought and it makes sense that it'd work well for lefties.

That's pretty clever! A good writing surface other than a wood table can also improve the comfort of writing as well.