Oh, please make sure you know what kind of fabric is before using ANYTHING.
Acetone (finger nail polish remover) is a very potent chemical which will melt some synthetic fibers. There should be tags inside the fabric or on the underside of the skirt of the furniture - if you can't find care instructions, call the manufacturer and see what they recommend.
When we purchased our sofa, we were able to choose our fabric, and intentionally chose ones that could take solvents, water and soaps.
It's a simple phone call to make/research to do to save you potentially hundreds of dollars in a mistake.
As for the clothes, cottons should be OK, but I'd take the advice of the original poster and test in an inconspicuous place first to be certain. I ruined the dress I wore to my grandmother's funeral by accidentally spilling acetone on it.
Good luck!