Painting upholstered chairs- How can I make them softer?

Sherri McNeill
by Sherri McNeill
I painted some old office chairs and they are extremely stiff. The fabric is loose woven and somewhat stiff (think burlap). Used textile medium as instructed but it made no difference ( did 1 with and 1 without)and only seemed to thin paint and have it soak in even more. I saw some instructions that had you sand between coats but the fabric was so nappy I was afraid to even try it. Anything I can do to make it softer?
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