I have a customer who had 3000 sq. ft. of Honed and filled Travertine put in his basement.It was sealed with a water based color enhance sealer. The customer is not happy with it because it is streaky and a little sticky. It also is still dirty on the surface.He is wondering the best way to fix the problem.He told us that the floor was cleaned and then sealed.You can rub your hand on surface and pull up dirt. Ideas on quickest and cheapest way out.