How do you recommend grinding or sanding down the casting marks on concrete as pictured below? I eventually want to paint concrete white, but want it to look better than that.

Ideas, tips?

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get an angle grinder and concrete grinding pads. easily found online
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I'd wash the wall, fill imperfections if any I don't want with patching mud, sand, then skim coat with stucco. Probably an acrylic stucco.

I've sanded concrete before, never again, heh.
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grinder method works very well...be sure to wear a breathing apparatus and eye protection.
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This. That stuff is nasty if inhaled. My advice would be to wet sand it to keep down the dust.
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Thanks. Is the wet sanding just having a hose over it while grinding?
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