1.   Another possibility is to paint the deck with a nonskid, sand-finish paint, or add a nonskid material to regular deck paint.

2.   The back porches, painted with a deck paint, are OK, but the front porch floor was treated with linseed oil thinned with paint thinner.

3.   Use a latex masonry deck paint, but look for a brand that claims it is resistant to lifting by hot auto tires.

4.   What is the easiest way to get this deck paint off the concrete?

5.   Yes, you can paint it, or make a patch to replace the stained area, or sand the spot and use a latex deck paint.