Other than replacing worn pieces and resewing some areas, what kind of condition is it in. Also depending on how dirty it is, size. Factoring all that in it just really depends. If it's been a long time since the quilt has been used or stored. If it's hand quilted or machine quilted. I have a detachable shower head. DH made me a sweater screen (I call it). It fits over the bath tub. When I had to dry the sweaters flat, it worked great because the air could circulate and after washing the sweaters to make sure they were rinsed well, I took the detachable shower head and sprayed the sweaters to rinse clear. Then laid them flat on the screen they dried over night or when I was at work. you might be able to try a process similar.