Grinding your travertine will smooth out imperfections and open a new layer upon which it is possible to build a high quality honed or polished finish.
Grinding removes deep scratches, stains and other contaminations resulting in a very smooth and even surface able to reflect light more consistently. Grinding will also remove lippage, the term used for uneven tiles which can often occur after a typical installation.
Resurfacing is an extremely skilled task that requires patience and experience. If not done properly and to the right depth it may only enhance the scratches and impurities.