I bought satin pants at a ridiculously low price after they were worn once in a fashion show. They marked after a splashy hand washing or if worn out in the rain, and were a nightmare to iron - ruined if the steam iron burbled water. I had the same problem with a satin skirt, though I did get several wears from it. Seemed like it had to be laundered and carefully pressed after every wear.
Satin is now on my ‘no buy’ list.
Can’t say that I’ve seen satin pants out in the wild.