I have used Oxiclean powder disolved in water and sprayed onto the ceiling. My ceiling is a off white fabric that looks almost like carpet material. It took several applications, but the results are awsome. Do not rub the fabric as it will damage the nap of the fabric. Just dab it with a clean cloth. I found that working from the outside of the stain and working toward the center worked best. I hope this helps.
95 Newmar Kountry Star, Spartan Chassis, Venice, Fla