I'm thinking about making a large quilted throw....not big enough to cover the arms just the back,seat, and bottom front. Then make a fitted piece for the arms that covers the front, top, and sides. It woud just slip on and I'd use those twist pins to hold it.
I've got some bottom-weight twill in a kind of taupe color......pretty close to the color of my couch. I think I'm going to use poly fleece inside and just whatever for the wrong side....maybe an old sheet.
Well, I said quilted but it really won't be. My couch has 3 cushions....back and seat. It will only be 3 pieces....2 long seams from top to bottom. And those seams will be thru all 3 layers. That's why I'm using poly fleece....batting would need to be sewn closer. And I'll bind the edges with the twill also.
When (IF) I ever get it finished, I'll post a picture. Might be a while.....I won't even be starting on it for a few weeks.
Next couch is going to be mission style....wooden arms/sides!