I have a small screened porch (5 x 8) on my condo. The cement floor is a mess and I would like to cover it. I have heard that I should not use indoor/outdoor carpeting on it since it will harm the cement. Is this true? What would be the best way to cover the floor? I am elderly and it would be hard for me to try to paint it myself. Is there any covering that would be safe other than paint?