New to forum. I'm a tiler and have recently tried to play with micro cement. Needless to say it seems the drying process is key. My first install ended up with the poly blistering off in one spot which was guarding humidity and the micro cement has degraded. We are considering removing all the poly on the shower base and letting it completely dry out before repair and reseal. My question is what grit sandpaper should I use to safeguard the integrity of the micro cement, which is "Nature" by the way.
libbyd
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