WE sand blasted a pool,then sealer was applied. then we painted epoxy like we do with lots of pools. This pool when customer filled it the pool developed A white film on pool floor and walls???. as well with this film the color blue witch is color of epoxy is coming off on swimmers. I looked at pool and yes rub walls with my hand and yes a ting of blue. We have done lots of pools over the years and never seen this. Please help me