Saltillo Tile repair

[Lisa Eckman]

Does anyone have experience repairing (not replacing) Saltillo tiles? This is the terra cotta tile usually made in Mexico and dried in the sun. Has color variations (depending on sun/shade), and animal foot prints (chickens, etc. that walked through when tiles were wet). There are scratches in the tiles (probably from moving heavy objects), and I’m wondering if/how they can be repaired and protected from further damage. Any help/suggestions appreciated.