We have lived in hour home for almost 35 years. Our concrete slab in front of the garage has a few smaller cracks but one slab has lots of pitting on the surface. We have heard that concrete can be resurfaced without replacing the entire slab. Has anyone had any experience and does it hold up over time? We live in SE Wisconsin and temps range from highs in the 90's in the summer to ungodly cold in the winter. Thanks for any help.