Sent from my iPhoneAlthough porous, slate is pretty much bulletproof. Alkaline cleaner, scrub, extract, dry, multiple coats of penetrating sealer. Done.On May 2, 2017 9:33 PM, "Michael Alston" <realmikealston@gmail.com> wrote:Good evening, a cheimcal company has contacted me about cleaing several of there slate countertops. I have never cleaned slate countertops and won't see them until Friday and will take pictures then. Can I get some guidance on how to clean slate, thanks.--Visit list archives, subscribe, unsubscribe or change your subscription preferences: http://stoneandtilepros.simplelists.com/sccpartners Start a new conversation (thread): sccpartners@stoneandtilepros.simplelists.com Visit list archives, subscribe, unsubscribe or change your subscription preferences: http://stoneandtilepros.simplelists.com/sccpartners Start a new conversation (thread): sccpartners@stoneandtilepros.simplelists.comVisit list archives, subscribe, unsubscribe or change your subscription preferences: http://stoneandtilepros.simplelists.com/sccpartners Start a new conversation (thread): sccpartners@stoneandtilepros.simplelists.com