Hi could really do with your help on this one!!! i have just had a wooden block floor fitted for me for a customer by a reputable contractor. the problem is that there are marks all over the floor which look like splash marks across alot of the joints.. In my opinion it looks like someone has tried to fill some of the joints but not sanded them down enough, the contractor is now claiming that he needs to speak to his supplier as they never use filler.He has spoken to his fitter and they feel that some of the blocks were very oily when they were laid!! is this something you have come across before