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Tried a 4.5" grinder with a low grit sanding wheel, masonry grinding wheel, cup wheel, etc. Nothing worked that good. The grinding wheel worked but was horribly messy (clouded the whole room instantly) and would take a couple full days of work to finish.
No water since last time and it has been raining a lot.
Bought a basement and masonry waterproofer at Home Depot by Behr. Says for walls subject to hydrostratic pressure. Ideal for above or below grade basement walls...foundations...etc
Anyways to get the green stuff off could I use a chemical stripper or something and then clean the floor with Behr concrete cleaner and degreaser (says I should use before the waterproofing paint anyways). If so what kind?
Thanks
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