I have 3-14/36 rug it does have a rubber backing bought the rugs at wal-mart. Only 1 yr old. Paid $60 for all 3. They are multi color of off white brown w med turquoise color. Not loud colors. I want to touch up w a dark blue r navy color. I read your first idea. So I'm giving a more description of my rugs. Thanks. If you have any Suggestions again.