Yes, I strop on my jeans regularly. Since this is a final polishing/possibly aligning step, I haven't found that the curved surface presents a problem. It's sort of like a leather strop; that surface curves as well. For best results, I simply lay the blade completely flat on my jeans, (making sure I've made the fabric as taut as possible) and take ten or so strokes on both sides with medium pressure. DON'T try to maintain your sharpening angle, just lay the blade flat and push down a bit, and the curve created as you pull back will polish the edge whatever angle it happens to be. (Easier seen than described.) Let's face it, you aren't taking off enough metal to really ruin things anyway.
My results: Tri-Angle- scary sharp
Post-jean-strop- run from room screaming.
Of course, none of this is needed or wanted if you need a bit "toothier" edge, like for kitchen knives.