So I poured a bar top myself (first timer with concrete) and everything turned out great until I left a putty knife and a sanding sponge sit on top over night around 24-30 hours during cure. Now I have two spots where I can still see where they sat. Will these spots go away when I seal the top? If not, how can I get rid of the spots?

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Might fade over time.  We've acid washed and ground out some ghosting but that could change the whole look of the piece. 

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