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Can someone give a solution to remove dry cement and paint spots from cladding tile & kota stone?Is acid wash an option?

Hi ,
For removing cement and paint spots from cladding tile can be a mild acid wash, rather using tile washing chemical (little expensive) is better option.
For kota stone dont use acid since it will fade out the stone rather u can use water jet machine( used for car wash ) to remove hard stains. For stone wash also you get chemicals from different brands like stonera ,fosroc, vito etc..

While installing stone itself its always recommended to cover it with plastic cover till the final quote paintings are done. Stones like sadahrahalli, sera, white shades will turn out pale yellow if washed with hard acids.

Regards
Ar.Praveen.N
Ardes Architects and Interior designers
ardesarchitects@gmail.com
http://www.ardesarchitects.com
facebook.com/ardes.architects

Thank you so much for your advice! Most of this happen due to poor workmanship. I will try to follow what you said and see if that helps. Do you know any place where we can get the water jet machine for rent.Please pm me if you have any contact.