Gloss-Off by Krud Kutter. I found it at Sherwin Williams and the best part is it smells like soap. No strong odor, the store said they use it in schools because it has no odor and is so safe. Not having to sand is especially wonderful when you're painting something with curvy legs or embellishments.
Outdoor furniture cleaning solution: to 1 gallon of hot water, add: 1 cup Borax, ½ cup hydrogen peroxide, ¼ cup liquid dish soap (whatever you have on hand, but I like Dawn). Stir to dissolve Borax, then apply to furniture & cushions with a brush or scrubby sponge (check fabric for colorfastness, but peroxide would usually have to stand on fabric for hours to have a bleaching effect, if any). Rinse & repeat, if necessary.
How To Clean Upholstery, Also Known As How To Get The Funk Out Of Thrifted Furniture