Hi, I have a slate backsplash which looks dull. I want to get more sheen on it. Most of the enhance & seal products say that it enhances the color with matte or low sheen. I am looking for more sheen. Please help!

Good Afternoon all... I hope someone can give me some direction as to what to do... I have a 10x10 bathroom floor that I spent the better part of 4 nights with a chisel and hammer breaking up the tile floor.. I now am left with a floor that I gouged up fairly bad in some spots getting the chisel under the tile and also I have some spots of old thinset I guess that I need to sand down. I was thinking of using a 60 course sanding disk and my palm sander? In reading all the posts here, I am convinced I should use 1/4" backerboard over the plywood. My questions is: In putting the 1/4" backerboard down for the smoooth surface, doing so will put me about 1/4" over the toilet flange when I put the tile down. Is that an issue I should worry about, or will the wax ring take care of me there? If it is an issue, I will just go the way it was before and put the tile down on the plywood subfloor... Also, I went to home depot and saw the cement board and the easy to cut backerboard.. I was going with the easy to cut plain backerboard.. tan color.. $ 9.95 for a 3 x 5 sheet. Thanks!!!!!!! You guys are great Jon