I have just cleaned up the 100 year old quarry tiles in my kitchen/living room. The problem is there was hardly any grout there before hand, and even less now I've removed the dirt/lino/adhesive etc. I just wondered if anyone had any suggestions for re-grouting the very fine joints between them? (no damp-proof, bedded on 2 inches of lime mortar) Might fine lime mortar do? thanks