I'd like to resurface my 3 car garage concrete floor, attacked over the years with road salt, has quite a bit of pitting and is dusting. Is 1 1/2" concrete, fiber reinforced, a smart move? Or, do I need to go either thicker, or just maybe do SLC at maybe 1/2"? Existing appears stable, no settling, or cracks.

Concrete Sealer Question A little over a year ago I had a new driveway installed using an aggregate surface. After having the concrete sealed, I noticed some white and light areas within a one to two week period. The contractor said to wait awhile which I did. When the areas did not improve the contractor returned and resealed the driveway. To the best of my knowledge he did all the prep work required and I think did his job okay. I do recall one of the workers seem to tell me that these light areas will always be a possibility. In some spots the surface looks just like the original concrete without any sealer. It appears as if the concrete rejected the sealer. So, my question is why do I see these light or white areas and is that normal? Thanks, Jerry 7/14/13