my teacher reccomended i use the tuxedo file. I think its great but im a liitle confused. I use the white side for finishing but if the acrylic is some times bumpy it takes ages to file. also when im blending the tips i use the white side, is this ok as it sometimes takes a while to blend as the white side goes very soft. does this mean i need to use another file. I also did a rbalance on my mum and used the black side. After a while my mum screamed and her nail was red what does this mean? am i using this file correctly. also when im finishing i use the the white block then super shiney. Is this ok. sorry for the story but any answers much appreciated.