I always use wide, padded hangers but never thought about hanging things over other things. That’s a good idea.Are you going to wear it before the Summer?
If so, just enjoy it, wear it a lot and don't too long between cleans.
If not, store on a rounded, wide hanger (or add padding) or even over a Summer coat. You just have to protect the shoulder line.
I usually keep my twillaines folded for fear the knitted part could stretch over time if kept hung. Am I wrong?
The only things I hang are my coats and a crepe shirt with cashmere sleeves.