We used Tavy-thin skin on a small tile job in a foyer for the first time today they say you have to skim coat the paper with thin set after u get it glued down and we had issues with it drying and we even used rapid set ... Let it sit for a hr wasn't dry went to lunch put a fan on it... Came back an hr later and it still wasn't dry do you guys have any experience or opinions on this stuff ? Feedback would be greatly appreciated ...