Chill Rob, think happy thoughts, all is good with the world
Quote from: Rob Hall on June 06, 2014, 09:57:19 pmQuote from: clarkson on June 06, 2014, 09:45:05 amHi I am pressure washing indian sandstone today but the landscapers previously swept in a dry mix of sand and cement. So the faces are all cloudy Thought the 'travertiners' on here might no something to strip it back. Thinking maybe acid rinse CheersJohnI thought I had better check if I had given you some bad information, so,I "googled" Lithofin cement away...There is nothing on their web site to suggest that you cannot use it on sandstone, I have used it many times and not managed to etch the surface, how anyone can etch sandstone is beyond me, however, I use brushes all the time on such surfaces, they are brilliant and pleased to see that they are now being recommended as a first choice to sort this type of situation.RobCement Away should not be used on any stone that is acid sensitive or any stone that acid could affect. To a degree you are right that In general most but not all sandstone is not affected by acid. However because I am ultra careful when we restore stone the fact it is sedimentary means acid can or could cause other problems e.g. Iron additionally it can also contribute to speed up the fading process. So with this knowledge I don't take any risks hence the reason for my recommended method of the honing Powder. As for your little quip regarding the brushes I have always recommended brushes but only when they are appropriate. Kev MartinTiling Logistics
Quote from: clarkson on June 06, 2014, 09:45:05 amHi I am pressure washing indian sandstone today but the landscapers previously swept in a dry mix of sand and cement. So the faces are all cloudy Thought the 'travertiners' on here might no something to strip it back. Thinking maybe acid rinse CheersJohnI thought I had better check if I had given you some bad information, so,I "googled" Lithofin cement away...There is nothing on their web site to suggest that you cannot use it on sandstone, I have used it many times and not managed to etch the surface, how anyone can etch sandstone is beyond me, however, I use brushes all the time on such surfaces, they are brilliant and pleased to see that they are now being recommended as a first choice to sort this type of situation.
Hi I am pressure washing indian sandstone today but the landscapers previously swept in a dry mix of sand and cement. So the faces are all cloudy Thought the 'travertiners' on here might no something to strip it back. Thinking maybe acid rinse CheersJohn