Thanks Celeste, I kinda already hinted it's due to re-seal and that is not my field, so they are going to talk with whoever did it the first time.You upsell a restain & seal!! Clean or not, it's just not going to look good when you're done.
It doesn't just need sealing - the color looks like butt Sealer wore off, took the color with it and the black ick is the dirty concrete. SELL SELL SELL!!